My fish sometimes have an ich it looks like. So they quickly rub there bodies against the gravel or plants or rocks. Is this normal or an indicator of something wrong in the water. Just curious, the fish all seem to be healthy and have been around for a while. thanks in advance for any help.
. All tanks "cycle", which is the build-up of bacteria in the filter. This bacteria removes the toxins created by the fish poo and allows your fish to survive in your tank. I suggest you read 






