Looking for some advice. I have had my tank for a couple of months now and all has been good. All of a sudden some of the fish started dying. I decided to remove the fish from the tank and do a water change. One of my convicts just laid at the bottom of the bucket. I have put the fish back into the tank and they are all fine apart from the convict. He/she is just laying at the bottom of the tank on its side. To start off he/she wasnāt breathing but he/she is now breathing but still not moving. Need some advice on how to get her better and wether anyone knows what could be wrong with him/her. ??