smelly water
If you are sure you are not OVER feeding, (this is relative since some may say you are and others may say you are not), and you are doing partial water changes religiously (assuming you are pulling out gunk from the bottom and not just taking out water with the hose somewhere in the middle of the water column). Look under/around decorations, rocks and/or caves you may have made. If your tank is heavily planted go through the leaves with your fingers, etc. I can almost guarantee there has to be something rotting in the tank. Probably a dead something. — fish? snail?
joe t
Category: Philippines Internet Koi Society
