all good advice so far, but i'd like to add to the diagnosis.
if he is bleached after 8 months, chances are you dont need to be afraid that he'll die over the weekend, but he certainly wont be getting any better without change.
for food, if you can do garlic or selcon supplemented foods thats good, but not necessary--if you dont have the additives, dont wait to start feeding. if you have a korean grocery store (just trust me on this part) go there and look for a bag of frozen seafood mix--no preservatives, just frozen. should be about 6-9 dollars. take it home, while still frozen, blend it all into small small pieces--not pureed, but not chunks either. you will probably need to add small amounts of water while you are blending, this would be a good time to add garlic, selcon, etc if you have it. put the mix in ziploc bags so that when they lay flat, they are about 1/4-1/2 inch thick. freeze lying flat. break the frozen mix into 'bite sized' chuncks (thats why you dont make them 1" thick--learned that the hard way!) and feed every other day. fish, inverts, nems love this mix, but the detractor is if you follow that amount, you'll get dirty water pretty fast. i have dirty water, i overskim and do pretty decent water changes to keep mine in good shape--i also run a po4 reactor and a well lit macro algae portion in my sump. i'll also be adding phyto soon to further clean up my messy feedings.
the good news is my messy feedings contributed to my bta going from bleached to 5x original size to split to now 4x size with a clone that is 3x size in just 10 months.
i also have 175w mh which helps a ton.
