Fish Health Care

Maintaining the water quality is the most important factor in keeping fish healthy. Check the water regularly and every few weeks carry out a partial water change.

This means siphoning 10 - 20% of the water out of the tank and replacing it with new water which has been de-chlorinated.

By providing your fish with good quality water, ensuring the tank is properly filtered, correct feeding and maintaining a clean aquarium, your fish should remain healthy. If you observe any changes in behaviour or unusual spots or markings on your fish they may need treatment. Please ask a member of Pets at Home staff for advice.

Common Ailments of Fish...?

New Tank Syndrome

It is possible for fish recently introduced to an established aquarium, to die within the first few days. Deaths may be the result of a sudden change in water chemistry or quality. It is essential that you check the chemistry of your tank before you introduce new members so you can be sure that they can easily acclimatise.   Always introduce fish into their new home gradually.

Poisoning

Many domestic chemicals, such as paint fumes and household cleaners, are highly toxic to fish. If your aquarium becomes contaminated with one of these it could potentially have fatal consequences. If an accident occurs you should re-house the fish while you thoroughly clean the tank.

How many fish can I keep in my tank?

With any fish, coldwater or tropical, having enough space to live happily is vital and over stocked tanks are common. With all fish, living with bullies is stressful enough, without being cramped up together in a small tank. So to ensure you create a happy community in your tank always ask advice before purchasing any new fish to check everyone will get on. There are no exact rules to how many fish you can fit into one tank but following this guide can be useful, but remember, always take into account how big your fish will grow.

Coldwater fish: 0.5cm of fish per litre of water

Tropical fish: 1cm of fish per litre water