Waterlife PoolShield with aloe vera is an advanced fast-acting dechlorinator and water conditioner. It neutralises toxins in tap-water such as chlorine chloramine and fluorine which are harmful to fish plants and filtration bacteria. PoolShield also contains the soothing properties of aloe vera to help reinforce the fishes\' protective mucus coating and help tissue regeneration after an infection. Poolshield should be used when initially filling up your pond when topping up evaporation losses and when carrying out a partial water change. - Dechlorinator water conditioner. - Contains aloe vera for added protection. - Safe with fish plants and filtration bacteria. 500 ml bottle (22500 litres)