I purchased a Helfrich's firefish about a week and a half ago from Mid-Cities Aquariums. He looked fine at the time, but upon getting him home, I noticed some ich spots under the lights. I put him (along with my 2 clownfish) in a 10-gallon QT and slowly dropped the salinity down over 36 hours from 1.026 to 1.009. I've been doing 20% water changes every 2 days, and the salinity has been very stable. The pH has been somewhat low (mid to high 7's), but the other parameters have been fine. I have an ammonia alert badge in the tank, and it always reads "safe" (I've been using Prime in the water since the QT has no sand or rock). The temp in the QT is 78 degrees. The firefish's ich spots cleared up in the first few days, and his color improved noticeably. My clownfish seem perfectly fine, and the firefish seemed happy until today. He did not eat today (just watched the food float by), and for better part of the day, he has been laying around on the bottom of the tank, usually in a corner or along an edge, opening and closing his mouth fairly rapidly. Half the time he's laying on his side, almost motionless. I'm not sure what I can do to help this little guy... He's only been in the QT about 8 days. I added some of the B-Ionic alkalinity solution to bring the pH up to a more reasonable level, but it doesn't seem to be helping. Any suggestions are welcome! Thanks.