For past few weeks, my gf is always at the bottom of the tank, life-less. Except when feeding time, then it wakes-up n eats alot. But after that its back to sleeping at a bottom corner. He wasnt like this before.

Has anyone experienced this? Is it due to intestinal worms maybe? Pls advice.

Have already tried treatment with salt, Interpet#9, Melafix, ParaGuard, but no change.

Thanks