the mode that the vortechs are on varies. Sometimes it is on reef crest if I feel I want to give the fish a workout and kick up any detritus that is stuck between the rocks. Sometimes I will turn it down to pulse mode so the Colt coral can open up in all its glory. I feed my tank a pretty good amount. The fish are fed 2-3 times per day with spectrum pellets, mysis shrimp, pe mysis shrimp, ova prawn, cyclopse, nori, some brine if I want to give the fish a treat.