Yeah, I do try to feeding them as regularly as possible, but sometimes I forget. Most of the time, I don't direct feed them tho, just the tank. I blend my own food that includes a bunch of seafoods from an Asian market, along with mysis, cyclopeze, frozen brine, and anything else I can get my hands on.
All of mine are on the sandbed too. Recently changed my bulb to an Ushio 20K 150W and the colors seem a little better. I think if you have actinics or blue+ on your T5's, that prolly helps too.