Take a look into the spurilina tablets. They are the same size as the fish. That is why I fed them bi-daily. And none of the other fish are having any problems with it. :?
Edit:
Oh, and no sign of being skinny or bloated. I checked in on them three times per day. And no discoloration at all. The tank next to them did have some pH problems (the pH dropped from a little lower than 8.2 to lower than 4.0) but someone had added some sort of acid into that tank. This one had normal pH, normal ammonia, normal nitrite, normal disolved oxygen, normal carbon dioxide levels, everything seemed fine until the next morning everything was dead in that tank (only the four plecos).