Originally Posted by reaperss06
I noticed you hit on the external but what about internal medications?? Can those be harmful? Because my fish seems a little out of it, didnt eat this morning and has just been laying around all day. Moves and swims every now and then. One time I fed him, he ate one pellet then spat another one out that had white stuff on it.
I am assuming you mean meds for intestinal worms? They will still suck oxygen out of the water but some internal medications are harsher than others. For instance, Jungle Parasite clear is safe enough to use with fish like dwarf puffers who can't even handle coppersafe. THEN there's levamisole, a livestock dewormer used with fish that, while safe for inverts, can totally blow your biofilter out of the water and also turns your water acidic.
If this is an issue wt lethargic fish lets start from the beginning:
How big is the tank?
Is it uncycled or cycled?
How much water do you change?
How often do you change the water?
Please try to answer these to the best of your ability. If you do not have a test kit, please bring a sample of tankwater to the nearest local pet store. They should test it for cheap, but most of the time free. Write the actual numbers down, don’t take ‘okay’, ‘low’ or ‘fine’ for an answer.