TetraPond AquaSafe 500ml neutralises chlorine and chloramine found in tap water which, while safe for humans, is very harmful for pond fish. AquaSafe can be used when filling a new pond or performing a partial water change and leaves no unsightly residue in the pond, and even removes poisonous heavy metals such as copper, zinc and lead. As well as removing harmful compounds from tap water, the product also contains colloids which promote the healthy growth of the vital mucus membrane on fish skin, helping to protect them from injuries and infections and speeding wound recovery. AquaSafe is an essential for any pond owner looking to keep pond fish safe and healthy.