Water Conditioner Even the best tap water is totally unsuitable for use in your aquarium. Chlorine and other pollutants are deliberately added to prevent the growth of bacteria. So always use a good aquarium water conditioner to prepare new water for use in your setup.
pH Adjuster The pH of tap water in the UK does not often resemble the pH of the water your fish originated from. In order to appreciate your livestock's best colour and longest life, you should use a pH adjuster to maintain a pH value which is close to their natural home.
Bacterial Additives All aquarium filters function with the aid of beneficial, aerobic bacteria. It's best to introduce these via good live bacteria culture such as Nutrafin Cycle or Tetra SafeStart. Both of these products will allow you to mature a new setup or filter in a fraction of the usually required time and may well save the life of your fish at the same time.