Starting your pond off right in the spring is one of the most important things you can do for your pond. Aquascape pond starter bacteria quickly establishes the biological ecosystem for spring start-up and for new ponds. Safe for fish, plants and animals. Because tap water including well water often contains chlorine, chloramines and heavy metals, that if left untreated can cause damage to the pond ecosystem. Aquascape Pond Detoxifier eliminates chlorine, chloramines, ammonia and chelates heavy metals making them safe for fish and plants and allowing for metals like iron to be used by pond plants as fertilizer.