I find these VibraGrow pellets to be an excellent food source for many critters in my tank. When first added to the tank many of the smaller fish eat them with gusto. Missed pellets are quickly eaten by my various starfish and sand bed fauna.
The canister on the left with the red top has larger pellets than the other canister. I feed a heavy pinch of each in addition to the regular tank food I use every day. The larger pellets tend to be gobbled up first by the fish and most of the smaller pellets help feed the sand bed. I suggest you store these in your refrigerator once opened to preserve its nutritional value.