I have a two year old African marbled lungfish who has recently become very sick. After moving him into a 250 gallon indoor pond he retreated to his cave for a few weeks and I hardly saw him. Now about three weeks after the move I got him out to find what appears to be a fungal infection on his back limbs tail and a spot on his head. He is lethargic at least till you pick him up. It seems to be eating away at his limbs like fin rot as one leg is now just a nub and other two look very ragged. I tried jungle fungle but it did nothing. Now trying salt bath once a day and methylene blue in a quarantine tank. Any advice would be greatly appreciated.