My friends Oscar has extremely bad HITH( Hole in the Head) for around 5 months and its bad. We need some ideas on how to cure it, he's been treating it with melafix,pimafix, general cure, aquarium salt, and doing general tank maintenance. We have seen small signs of improvement then it gets bad again. He is in a 200 gallon with various cichlids and bichirs and large ass clown knife. around 275 gallons of filtration, planning on adding a power filter fairly soon. He cant afford a quarantine tank right now. He's on a 14 year old budget so dot didly dot. He eats fine and acts completely normal but he looks horrible. Please respond quickly he's had it for a long time and doesnt want to lose a friend, you guys should understand. Thank you all! Also what is epsom salt and how do you use that? Does it treat HITH?