Well the tank made two moves due to loss of a job and a relative was keeping him for us for about 4 months and unfortunately water changes only occurred about once a month, how often do you recommend water changes ( I have 2 large HOBs and only have him which is about 10 inches a 3 inch JD and a 9 inch Pleco in a 125 gal ?). I feed them mostly hikari gold pellets and nightcrawlers,and crikets, no feeders. I took a sample in to lfs and was told the water was fine but I guess i need them to show me the exact parameters. How long will it take to heal this up and how frequent should i do changes to take care of this problem, and will this spread to the other fish? Thanks for all the help.where did you move him from? do you feed feeders? if your water params are good and you have a good water change routine then you will need to medicate to get rid of it. HITH is Hole In The Head disease and is usually 90% of cases caused by poor water quality but is also caused by a parasite so if yours has been housed in good conditions with good food then you will need to treat for it
and what is "checked out fine" what were the actual parameters? and how often do you usually change the water?