Free shipping from €50 (and to Belgium from €100.00)
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Free shipping from €50 (and to Belgium from €100.00)
Many Payment Methods, including iDEAL, PayPal, Apple Pay, Google Pay, Credit Card & Bancontact.
Free shipping from €50 (and to Belgium from €100.00)
Many Payment Methods, including iDEAL, PayPal, Apple Pay, Google Pay, Credit Card & Bancontact.
Free shipping from €50 (and to Belgium from €100.00)
Many Payment Methods, including iDEAL, PayPal, Apple Pay, Google Pay, Credit Card & Bancontact.
Free shipping from €50 (and to Belgium from €100.00)
Many Payment Methods, including iDEAL, PayPal, Apple Pay, Google Pay, Credit Card & Bancontact.
Free shipping from €50 (and to Belgium from €100.00)
Many Payment Methods, including iDEAL, PayPal, Apple Pay, Google Pay, Credit Card & Bancontact.
Free shipping from €50 (and to Belgium from €100.00)
Many Payment Methods, including iDEAL, PayPal, Apple Pay, Google Pay, Credit Card & Bancontact.
Free shipping from €50 (and to Belgium from €100.00)
Many Payment Methods, including iDEAL, PayPal, Apple Pay, Google Pay, Credit Card & Bancontact.
Welcome to MaJa Koi
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75 9th Ave, New York, NY 10011, USA
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Remove bottom sludge
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€50,00
Duo Pack 6000 (Biobooster+ & Bactogen) – Aquatic Science
Complete biological treatment for clear, healthy and stable pond water.
The Aquatic Science Duo Pack 6000 combines Biobooster+ and Bactogen, two complementary products that together ensure a powerful biological balance in your pond. Biobooster+ increases the oxygen level and stimulates bacterial activity for a rapid breakdown of organic waste, while Bactogen strengthens natural filtration and structurally improves water quality.
Key benefits
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Double biological action – Biobooster+ activates, Bactogen maintains.
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Speeds up the breakdown of organic waste – visible effect within a few hours.
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Strengthens biological filtration – reduces sludge and prevents ammonia buildup.
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Safe and environmentally friendly – harmless to fish, plants and filter systems.
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Combination pack 6000 – ideal for ponds up to approx. 6 m³.
Application
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Step 1 – Biobooster+
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Distribute evenly over the pond surface at temperatures above 14 °C.
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Leave to work for 10 to 15 minutes and remove floating waste with a skimmer.
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Temporarily switch off UV filtration during treatment.
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Step 2 – Bactogen
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Start 5 days after the Biobooster+ treatment.
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Dosage: 2 scoops per 5 m³ per day for 5 days.
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Maintenance: 2 scoops per 5 m³, 3 to 4 times per month.
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Regularly check pH, KH and GH and adjust if necessary with KH+ or GH+.
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Store both products dry between 10 °C and 25 °C.
€14,00
Biobooster+ 3000 – Aquatic Science
Improve water quality with natural oxygen enrichment.
Aquatic Science Biobooster+ 3000 is a mineral formula that releases oxygen immediately upon contact with water. This oxygen reaction promotes the breakdown of organic waste, reduces sludge, and helps prevent ammonia buildup. Ideal for smaller ponds or as a regular maintenance treatment in combination with Bactogen and Ichi Food.
Key benefits
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Increases oxygen levels – supports fish, bacteria, and biological processes.
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Promotes the breakdown of organic matter – prevents sludge and biofilm formation.
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Prevents ammonia buildup – reduces the load on the filter system.
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Safe and environmentally friendly – only oxygen and mineral salts as byproducts.
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Compact 3000 packaging – ideal for smaller ponds or seasonal maintenance.
Application
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Shake the package well before use.
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Distribute evenly over the pond surface at temperatures above 14 °C.
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Remove debris or leaves from the surface for optimal results.
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Temporary foaming or slight cloudiness is normal.
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Repeat application regularly, with at least 15 days between treatments.
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Store in a dry place between 10 °C and 25 °C.
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Lasts up to 6 months after opening.
AquaActiv SediFree 700 g (500 ml) – Oase
Natural sludge removal for smaller ponds
AquaActiv SediFree 700 g from Oase offers powerful yet gentle cleaning of the pond bottom – ideal for smaller ponds. Thanks to the innovative 2-component system with active oxygen and special bacteria, organic sludge is effectively broken down without the need to dredge or change the water.
The granules with active oxygen sink to the bottom and oxidize the sludge, after which the bacteria further break it down. This prevents new sludge formation, cloudiness, and the formation of algae pads.
Benefits:
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Powerful bacteria effectively break down organic sludge
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Active oxygen accelerates decomposition
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No physical maintenance required, such as dredging
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Actively combats cloudy water and sludge buildup
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Ensures a cleaner pond bottom and clear water
AquaActiv SediFree: the natural solution for a healthy pond, even on a smaller scale.
€212,45
Biobooster+ 200 m³ – Aquatic Science
Powerful oxygen activation for large ponds and professional applications.
Aquatic Science Biobooster+ 200 m³ is a mineral formula that releases oxygen directly upon contact with water. This oxygen reaction stimulates the breakdown of organic waste, prevents ammonia buildup, and promotes a healthy biological balance. Ideal for use in combination with Bactogen and Ichi Food for maximum filter efficiency and stable pond water.
Key benefits
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Direct oxygen enrichment – increases the oxygen level for fish and beneficial bacteria.
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Speeds up the breakdown of organic material – prevents sludge and pollution.
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Promotes biological filtration – reduces the risk of ammonia and filter clogging.
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Safe and natural – exclusively oxygen and mineral salts as metabolites.
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Large package 200 m³ – suitable for large ponds and professional installations.
Application
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Shake the package well before use.
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Distribute evenly over the pond surface at temperatures above 14 °C.
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Remove visible waste from the water surface for optimal performance.
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Temporary foaming or slight cloudiness is normal.
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Repeat the application regularly, with at least 15 days between applications.
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Store in a dry place between 10 °C and 25 °C.
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Good for 6 months after opening.
€61,27
Sa
Biobooster+ 24000 – Aquatic Science
Intensive oxygenation for clear and healthy pond water.
Aquatic Science Biobooster+ 24000 is a powerful mineral formula that releases oxygen immediately upon contact with water. This oxygen reaction stimulates the breakdown of organic waste, prevents ammonia buildup, and promotes a stable biological balance. Ideal for maintaining medium to large ponds and perfect to combine with Bactogen and Ichi Food for optimal water quality.
Key benefits
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Instant oxygen activation – increases the oxygen level in the water.
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Breakdown of organic waste – reduces sludge, dirt, and biofilm formation.
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Improves biological filtration – prevents ammonia buildup and filter clogging.
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Natural action – only oxygen and mineral salts as metabolites.
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Large package 24000 – suitable for larger ponds and intensive maintenance.
Application
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Shake the package well before use.
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Distribute evenly over the pond surface at temperatures above 14 °C.
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Remove visible waste from the surface for optimal results.
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Temporary foam formation or slight turbidity is normal.
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Repeat the application regularly, with at least 15 days between applications.
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Store in a dry place between 10 °C and 25 °C.
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Good for 6 months after opening.
€122,00
Duo Pack 24000 (Biobooster+ & Bactogen) – Aquatic Science
Complete biological treatment for lasting water clarity and a healthy pond ecosystem.
The Aquatic Science Duo Pack 24000 combines Biobooster+ and Bactogen, two powerful products that work together to restore and maintain the biological balance of your pond. Biobooster+ increases oxygen levels and activates beneficial bacteria for the rapid breakdown of organic waste, while Bactogen stabilizes filtration and strengthens the bacterial population. Ideal for medium to large ponds where clarity and water quality are priorities.
Key benefits
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Dual action for maximum efficiency – Biobooster+ activates, Bactogen maintains.
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Fast-acting on organic waste – visible results within hours.
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Enhances biological filtration – reduces sludge formation and filter clogging.
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Prevents ammonia buildup – supports healthy bacterial populations and fish welfare.
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Safe and natural – no harm to fish, plants, or filter systems.
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Combination pack 24000 – ideal for ponds up to approx. 24 m³.
Application
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Step 1 – Biobooster+
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Distribute evenly over the pond surface at temperatures above 14 °C.
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Leave to work for 10 to 15 minutes and remove floating organic waste.
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Turn off UV filtration during treatment.
-
-
Step 2 – Bactogen
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Start 5 days after the Biobooster+ treatment.
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Dosage: 2 scoops per 5 m³ per day for 5 days.
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Maintenance: 2 scoops per 5 m³, 3 to 4 times per month.
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Regularly check the pH, KH, and GH and adjust with KH+ or GH+ if necessary.
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Store both products in a dry place between 10 °C and 25 °C.
€75,00
Duo Pack 12000 (Biobooster+ & Bactogen) – Aquatic Science
Complete biological treatment for clear, healthy and balanced pond water.
The Aquatic Science Duo Pack 12000 combines Biobooster+ and Bactogen, two complementary products that together ensure optimal biological performance in the pond. Biobooster+ increases the oxygen content and stimulates the natural breakdown of organic waste, while Bactogen strengthens the bacterial population and sustainably optimizes filtration. Ideal for anyone who wants to maintain a clear, healthy and stable pond ecosystem.
Key benefits
-
Double action for maximum efficiency – Biobooster+ activates, Bactogen stabilizes.
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Speeds up the breakdown of organic waste – prevents sludge formation and filter clogging.
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Improves biological filtration – increases bacterial activity and water purification.
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Prevents ammonia buildup – protects fish and maintains water quality.
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Safe and environmentally friendly – no harm to fish, plants or filtration systems.
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Combination pack 12000 – suitable for ponds up to approx. 12 m³.
Application
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Step 1 – Biobooster+
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Distribute evenly over the pond surface at temperatures above 14 °C.
-
Leave to work for 10 to 15 minutes and remove floating organic waste.
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Turn off UV filtration during use.
-
-
Step 2 – Bactogen
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Start 5 days after Biobooster+ treatment.
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Dosage: 2 measuring spoons per 5 m³ per day for 5 days.
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Subsequently: 2 measuring spoons per 5 m³, 3 to 4 times a month.
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Regularly check pH, KH and GH and adjust if necessary with KH+ or GH+.
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Store the products dry between 10 °C and 25 °C.
€31,00
Duo Pack 3000 (Biobooster+ & Bactogen) – Aquatic Science
Compact, complete solution for clear and healthy pond water.
The Aquatic Science Duo Pack 3000 combines Biobooster+ and Bactogen, two complementary products that together ensure an optimal biological balance. Biobooster+ increases the oxygen level and stimulates the natural breakdown of organic waste, while Bactogen strengthens the bacterial population and optimizes biological filtration. Ideal for small to medium-sized ponds.
Key benefits
-
Double biological action – Biobooster+ activates, Bactogen maintains.
-
Speeds up the breakdown of organic waste – visible results within a few hours.
-
Improves water quality – prevents sludge, filter clogging and ammonia buildup.
-
Safe and environmentally friendly – harmless to fish, plants and filter systems.
-
Compact 3000 packaging – suitable for ponds up to approx. 3 m³.
Application
-
Step 1 – Biobooster+
-
Distribute evenly over the pond surface at temperatures above 14 °C.
-
Leave to work for 10 to 15 minutes and remove floating waste with a skimmer.
-
Temporarily switch off UV filtration during treatment.
-
-
Step 2 – Bactogen
-
Start 5 days after the Biobooster+ treatment.
-
Dosage: 2 scoops per 5 m³ per day for 5 days.
-
Thereafter: 2 scoops per 5 m³, 3 to 4 times a month.
-
-
Regularly check pH, KH and GH and adjust if necessary with KH+ or GH+.
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Store both products dry between 10 °C and 25 °C.
€190,00
Clean-Lac 3.5 kg – 250 m² – Aquatic Science
Natural water purification for medium-sized ponds and water features.
Aquatic Science Clean-Lac 3.5 kg was developed to improve water quality in ponds or bodies of water where filtration is not possible. The unique formula combines minerals, oxygen enrichment, and bacterial action to remove pollution, restore the mineral balance, and reduce phosphates — the main cause of algal blooms.
Key benefits
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Restores the mineral balance – promotes a stable and healthy ecosystem.
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Increases oxygen levels – optimizes oxygen supply in water and sludge.
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Stimulates bacterial action – accelerates the breakdown of organic waste.
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Removes phosphates – prevents algae growth and eutrophication.
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Effective from 10 °C – ideal for seasonal maintenance in spring and autumn.
Application
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Spread the powder evenly over the water surface.
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Preferably use in combination with an oxygenator for even distribution.
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Dosage: 3.5 kg Clean-Lac for 250 m² of water surface.
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For long-term pollution: first treat with Biobooster+.
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Apply at water temperatures above 10 °C.
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Store in a cool, dry place and protect from moisture.
€23,00
Clean-Lac 0.35 kg – 25 m² – Aquatic Science
Restore the natural balance of still water without filtration.
Aquatic Science Clean-Lac 0.35 kg is a professional formula developed to improve water quality in ponds, lakes, or bodies of water where filtration is not possible. Thanks to the combined action of minerals, oxygen enrichment, and bacterial activity, sources of pollution are removed and algal blooms are prevented.
Key benefits
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Improves the mineral balance – stabilizes the chemical composition of the water.
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Provides extra oxygen supply – increases the oxygen level in water and sludge layers.
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Bacterial action – accelerates the breakdown of organic waste and pollution.
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Removes phosphates – prevents eutrophication and excessive algae growth.
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Effective from 10 °C – ideal for use in spring and during warmer seasons.
Application
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Spread the powder evenly over the water surface.
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Preferably use in combination with an oxygenator for optimal distribution.
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Dosage: 0.35 kg Clean-Lac for 25 m² of water surface.
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For long-term pollution: perform a preliminary treatment with Biobooster+.
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Apply at water temperatures above 10 °C.
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Store cool and dry, away from moisture.
€390,00
Clean-Lac 12 kg – 800 m² – Aquatic Science
Restore water quality in large ponds and lakes naturally.
Aquatic Science Clean-Lac 12 kg is a powerful formulation that improves water quality when the volume is too large to filter. The combination of minerals, oxygen enrichment, and bacterial action stabilizes the ecosystem, reduces pollution, and removes excess phosphates – the main cause of algal blooms and water turbidity.
Key benefits
-
Improves the mineral balance – stabilizes the water for a healthier ecosystem.
-
Increases oxygen supply – improves oxygen levels in water and sludge.
-
Stimulates bacterial activity – efficiently breaks down organic pollution.
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Removes phosphates – prevents eutrophication and unwanted algal growth.
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Large 12 kg package – ideal for lakes, large ponds, or nature projects.
Application
-
Spread the powder evenly over the water surface.
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Preferably use in combination with an oxygenator for optimal distribution.
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Dosage: 12 kg Clean-Lac for 800 m² of water surface.
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For long-term pollution: first carry out a treatment with Biobooster+.
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Suitable for water temperatures above 10 °C.
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Store cool and dry, protected from moisture.
Biobooster+ 40000 – Aquatic Science
Powerful oxygen activator for large ponds and intensive use.
Aquatic Science Biobooster+ 40000 is an advanced mineral formula that releases oxygen immediately upon contact with water. This oxygen reaction accelerates the breakdown of organic waste, prevents ammonia accumulation, and supports natural biological filtration. Perfect for large ponds, koi ponds, or installations where water quality and clarity are a priority.
Key benefits
-
Immediately increases oxygen levels – promotes a healthy ecosystem for fish and bacteria.
-
Accelerates the breakdown of organic waste – reduces sludge, biofilm, and pollution.
-
Prevents ammonia accumulation – supports stable biological filtration.
-
Safe and natural – only oxygen and mineral salts as byproducts.
-
Large 40000 pack – ideal for large ponds and professional maintenance.
Application
-
Shake the container well before use.
-
Distribute evenly over the pond surface at temperatures above 14 °C.
-
Remove debris and leaves from the water surface for optimal results.
-
Temporary foaming or slight turbidity is normal.
-
Repeat application regularly at intervals of at least 15 days.
-
Store in a dry place between 10 °C and 25 °C.
-
Good for 6 months after opening.
€33,99
Biobooster+ 12000 – Aquatic Science
Active oxygen enrichment for a healthy and clear pond environment.
Aquatic Science Biobooster+ 12000 is a powerful formula based on minerals and mineral oxides. Upon contact with water, oxygen is immediately released, breaking down organic waste and strengthening the biological balance in the pond. Ideal for use in combination with Bactogen and Ichi Food to prevent filter clogging and ammonia accumulation.
Key benefits
-
Oxygen enrichment – increases the oxygen level for fish and bacteria.
-
Breakdown of organic waste – accelerates the natural cleaning of the pond.
-
Prevents ammonia accumulation – supports the operation of biological filtration.
-
Safe and natural – metabolites consist exclusively of oxygen and mineral salts.
-
Large package 12000 – ideal for medium to large ponds.
Application
-
Shake the package well before use.
-
Distribute the product evenly over the pond surface at temperatures above 14 °C.
-
Remove organic waste from the surface for optimal results.
-
Temporary foaming or slight turbidity is normal.
-
Repeat the application regularly at intervals of at least 15 days.
-
Store in a dry place between 10 °C and 25 °C.
-
Good for 6 months after opening.
€24,00
Biobooster+ 6000 – Aquatic Science
Active oxygen boost for a healthy and clear pond environment.
Aquatic Science Biobooster+ 6000 is a powerful mineral formula that immediately releases oxygen upon contact with water. This oxygen reaction accelerates the breakdown of organic waste, prevents ammonia buildup, and supports biological filtration. Ideal for medium-sized ponds or as a regular maintenance treatment in combination with Bactogen and Ichi Food.
Key benefits
-
Instant oxygen enrichment – stimulates the biological balance in the pond.
-
Breakdown of organic material – reduces sludge and prevents cloudy water.
-
Enhances filtration – prevents ammonia buildup and filter clogging.
-
Natural action – only oxygen and mineral salts as byproducts.
-
Efficient 6000 packaging – suitable for medium-sized ponds or seasonal maintenance.
Application
-
Shake the package well before use.
-
Distribute evenly over the pond surface at temperatures above 14 °C.
-
Remove leaves and other debris from the surface for optimal results.
-
Temporary foaming or slight cloudiness is normal.
-
Repeat the application regularly, with at least 15 days between treatments.
-
Store in a dry place between 10 °C and 25 °C.
-
Good for 6 months after opening.
Contents: 300 g (for approx. 6 m³ of water)
Brand: Aquatic Science
Application: Ponds & aquariums – oxygen enrichment, waste breakdown and biological support
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