Neutralises harmful chemicals in tap water. A natural solution designed to neutralise chloramine and other harmful chemicals in tap water. Ponds are often topped up with tap/town water, which contain harmful chemicals and heavy metals. These can damage the protective mucous membrane (slime coat) on fish. Pond Starts protects the fish from this damage and prevents the build up of ammonia from the break down of chloramine. TIP: In a NEW POND, use in conjunction with PondPro® FilterStart water treatment to kick start the biological activity.