A question we hear quite a lot is “how often should I replace the water in my fish tank”? Well, cleaning your tank is actually fairly simple and shouldn’t take too long. The better care you take over your tank, the healthier and happier your fish will be.
You don;t normally have to remove everything from the tank when you clean it – plants and decorations can stay in the tank. It creates more work for you if you do remove them, and it is handy to keep some bacteria in the tank which are part of the biological filter.
You also should not remove your fish when you do your regular 10-15% water change. This, again creates more work and is uneccessary. It can be very stressful for the fish too, which you want to avoid.