Prodibio Bio Clean offers two complementary products in the same box. The power of Bio Digest and the stimulating effect of Bioptim to clean aquariums and remove algae. The heterotropic bacteria in Bio Digest biologically clean aquariums by digesting waste, each strain completing the work started by another. They thus purify, reduce nitrates and phosphates and prevent the growth of algae. As bacteria do not multiply at the same speed, to maintain optimal proportions it is recommended to use one ampoule of Bio Digest avery fortnight. Bioptim is a concentration of trace elements and micro-nutrients that can speed up the rate which bacteria multiply and enzymes are produced by up to 10 times in order to digest aquarium waste. Bioptim in combination with Bio Digest, restore vigour and health in saltwater, provides clearer, cleaner water, livelier fish and healthy invertebrates.Dosage for Prodibio Bio Clean Marine:add 1 ampoule of Bio Digest every 2 weeks on up to 1000 litres of wateradd 1