OASE AquaActiv PhosLess Direct 500 ml

OASE AquaActiv PhosLess Direct – Fast-Acting Phosphate Remover for Ponds

Excess phosphate is one of the main nutrients fuelling algae and weed growth in ponds, and it can be hard to bring back under control once levels get away from you.

OASE AquaActiv PhosLess Direct quickly reduces phosphate levels below the algae growth threshold of 0.035mg/l, helping prevent nuisance algae blooms and improve overall water clarity. It also binds hydrogen sulphides, eliminating the unpleasant odours they cause. If you’d like to track your phosphate levels over time, our water test kits let you predict algae outbreaks before they take hold and understand the extent of the problem.

Features & Benefits

• Physically binds and removes excess phosphate, reducing algae growth
• Neutralises hydrogen sulphides that cause bad odours
• Fast acting, lowering phosphate levels below algae-supporting limits
• Precipitated residues remain active, continuing to store phosphates over time
• Effective for phosphate management even during colder months

Directions for Use

• Distribute approximately 50mL per 1,000L evenly across the pond surface in still conditions
• Do not scatter directly over plants
• Reduce filter output during application and ensure adequate aeration
• Water may turn white or red temporarily as the product reacts
• After 24 hours, suction or filter out the precipitate if desired, though safe residues will continue binding phosphates long-term
• Repeat dosing every 6 to 8 weeks depending on nutrient load

Recommended For

• Ponds experiencing recurring algae or weed growth linked to high phosphate levels
• Ponds with unpleasant odours caused by hydrogen sulphides
• Ongoing phosphate management, including through winter

Why Phosphate Matters

Phosphate is a natural nutrient, but high levels fuel algae and weed growth, reducing water clarity and potentially lowering oxygen levels as organic matter decays. Common sources include fish waste, uneaten food, leaves and other organic debris, and fertiliser runoff from surrounding areas. Testing your water regularly, limiting overfeeding and removing organic debris all help keep phosphate levels in check alongside a binder like PhosLess Direct.

Specifications