Filter Start Tablets help to reduce the length of time that your pond suffers the effects of New Pond Syndrome. Filter Start boosts your filter and helps to keep it boosted. Filter Start Tablets ensure that your filter is able to neutralise the pollutants which are produced by your fish. Filter Start Tablets help your filter to produce the high quality water that your fish deserve. Contains no harmful chemicals. Safe for all fish, water plants, lilies and invertebrates.