Suddenly my severums have come down with something. They were fine a few days ago, but now they are lethargic and sitting under the filter. They come out when the tank lid is opened or when I feed them. They are breathing hard too, but I have plenty of air in the tank, I am running a Rena 200 on full blast in a 30G tank with a Fluval 3 blasting out on top of the water.
I also had the water checked out at my LFS
and the nitrates, nitrites, ammonium levels are fine. I have been doing a 25% water change every 5 days since 15 days ago when the water had very high nitrates. When the water had high nitrates/nitrites back then, I had had another severum for two weeks and he died after one of his eyes sort of bugged out.
The fish have darkened in colour, and they look like they have a few disintegrating/rotting scales if that makes sense, that are a whitish.grey colour.
I am currently treating the tank with Melafix. I am not sure what to do. Should I use Myzazin (can't spell)?- I have run out of it at the moment.