Okay, I saved my friends Jardini from his un-cycled tank. Actually, the Jardini was the only survivor. Well, I put it in my 55 gallon quaratine tank and it is doing great. No sign of sickness, swimming fine and eating like a champ. I decided to add some fish from another established tank to the 55 gallon. For some reason, every fish I've put in with the Jardini has either died or became very sick looking like ammonia burn. The Jardini still is doing well but I don't know why the other fish aren't. The frustrating thing is that the fish put in with the Jardini gets sick within an hour. The fish look like they have ammonia burn but very quickly as soon as I put it in the tank, while the Jardini is just fine and healthy. The 55 gallon tank has been cycled and been running for about 6 months. The water parameters are: ammonia 0, nitrite 0, nitrate <10, PH 6. Can anyone tell me what in my measurements are killing all of my fish but not the Jardini. I've never had anything like this before so I'm stumped. I do see that the PH is alittle low but why is my Jardini the only one that's stable and healthy?