The perfect biological filtration media. Easily rechargeable with Pond Salt . Pond Care Ammonia Remover and Ammo-Rocks are both products designed to remove toxic ammonia from pond water. Pond fish continuously release ammonia into the water from their gills, urine and solid waste. Uneaten fish food and decaying algae also release ammonia.
Ammonia is toxic to all fish.
Left untreated, ammonia damages delicate gill membranes and prevents the fish from carrying on normal respiration. High levels of ammonia quickly lead to fish death. Even trace amounts of ammonia can stress fish, suppressing the immune system. This causes a gradual decline of fish health and leads to outbreaks of disease in the pond. Normally, ammonia is consumed by an active biological filter, comprised primarily of nitrifying bacteria.