uh.... yeah i guess its a possibility. eh, take 1tbs of epsom salt and add it to some water, mix really well. add 1/8th to his tank today, add another 1/8th tomorrow morning unless he reacts badly to it. the reason he may react badly is because it such a small tank.
i guess you could try adding 1/4th over 2 days really slowly?? make sure you mix the water really well when you put it in there. too much will burn him.
is he still eating?? you could see if he eats a little deshelled pea??
also, can you get your ammonia/nitrites/nitrates tested?? almost ALL illness in fishkeeping is water quality related.
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