Aquaforest. AF Phosphate Minus, 500 ml.
25-100 ml per 100 l (27 US gal) of water. Phosphate Minus should be placed in media reactors with suggested water flow of at least 400 l/hr. It’s also suitable for a passive use in filter socks. Phosphate Minus should be replaced every 4 weeks or during significant rise of phosphate levels in the water. Shortly after placing in a filtration system, the product may slightly colour water. Although, Phosphate Minus should not be rinsed before use, brown dust is an active phosphate remover and is completely harmless for the aquatic life. Brown colouration of water will disappear after a short time. Rinsing the product in a RODI water will lower its efficiency.