I have a 110 tall with an Oscar, Green Texas cichlid, and a Pike cichlid. This however is not the problem but I saw a Green Terror at Petco one day where I generally refuse to buy fish from. I noticed his tail and top find we're completely missing and could tell he had fin rot but figured I could get him back. Although he was no where near the size of my other fish he had no problem in my big tank but I have a 20 gallon que tank that I decided to put him in after having problems getting the fins to grow back. He's only about 2.5 inches I have been able to make slight progress but it's been almost 2 months. I have tried salt, malafix, and a natural remedie I found at Petco. I dosed each seperatly before trying sometgung new in 2-3 week increments of each other. Still not much progress has been made. I've felt with this before in other fish but I have never had this hard of time. Anyone have any other thoughts or ideas. Btw I test my tanks regularly and ph is generally 6.4-7 almost never ammonia, nitrate and nitrite also 0.