Phosphate is one of the main nutrients for algae (blanket weed) in a pond. This filter cartridge makes it to keep the phosphate level below 0,035 mg/l. This is the “magic” limit that is too low for algae to grow but does not harm plants and bacteria. When the cartridge is saturated it must be replaced.

Phosphate is one of the main nutrients for algae (blanket weed) in a pond. This filter cartridge makes it to keep the phosphate level below 0,035 mg/l. This is the “magic” limit that is too low for algae to grow but does not harm plants and bacteria. When the cartridge is saturated it must be replaced. Reduces the phosphate in the water and supports the biofilter. Suitable for ponds, swimming ponds and fountains. Can absorb up to 90,000 mg (Phospat 1) or 270,000 mg (Phospat 3) phosphate. Consists of three layers of filter media. Multiple Phospat cartridges can be combined for larger ponds. Phospat cartridges should at least be placed behind a pre-filter to prevent contamination.