Tetra AquaSafe Plus Water Conditioner/Dechlorinator Contains seaweed extracts with support the development of beneficial filter bacteria Helps to reduce aquarium pollution by strengthening the bacterial bed Works in seconds to neutralize chlorine, chloramines, and heavy metals Contains seaweed extracts with support the development of beneficial filter bacteria Helps to reduce aquarium pollution by strengthening the bacterial bed Works in seconds to neutralize chlorine, chloramines, and heavy metals AquaSafeand#174 can be used with freshwater and marine fish AquaSafeand#174 is the market leading water conditioner brand in the US and has been protecting fish for over 30 years