Headed to Petland to restock my dad's 26g tank..(don't get on my case there are no other stores around me) I saw this strange eel, so I inquired about it. Apparently it was labeled at "Freshwater Moray Eel" while being housed in a brackish tank( I knew this was strange to begin with) yet his fish label did not specify that it was brackish, it stated "Freshwater community" which is obviously total rubbish because these things will snap anything smaller's neck with ease. So before I ramble on any longer, I knew my tank needed some work to better suit his needs, but I bought the eel, because let's face it, he was going to die in that 10gallon petland tank regardless, especially hiding so good that a normal customer would not have noticed it. I housed him in my 125gallon (freshwater) with a very small and friendly 1Round Bodied Green Terror, an equally as small 2Pigmy Albino Polypterus Senegalus, (3+4)2 larger Upside down Catfish who don't bother anyone at all, and the biggest scum bag in my tank 5: a 4-5 inch Tiger Shovel Nose catfish. Some may think I'm overstocked but I'm obviously not going to keep all of these fish if they reach gigantic sizes lol, I enjoy raising them and then sending them off to new homes. NOW, onto the water.. my parameters are all fine OTHER THAN my dreaded magical pH...it has been on 6.0(caused by driftwood, not an unknown imbalance, I have been adding small bits of crushed coral each day in an attempt to slowly raise it to about 7) for I don't know how long and nothing has perished due to the pH level..So I decide not to mess with it and let my fish live as they were..No fin rot, no infections, no ich all was great..until....Mr Moray. Fluval 305's as filtration, active bubbler, driftwood + fake plants and one banana plant that grew lily pads. He's swimming nicely and creeping through his surroundings, yet I have not seen him eat and his head is turning a strange yellowish/brown color while his eyes are beginning to cloud. I saw him get bit by my TigerShovel(out of fear, the TS didn't prowl on him, just jolted and bit him as the eel approached)I just did a 40% water change and attempted to medicate him. I'll be going out to grab some marine salt shortly to raise the salinity...is there ANYTHING ELSE I MUST DO TO SAVE HIM?!?!? I know I may seem foolish with this eel, but I promise I have saved fish from worse.