Are these necessary? I have a female convict that I purchased about 1 week ago. She is amazing. She completed my stocking for my 30 gallon with 4 tiger barbs and one BN Pleco. I feed the fish every day or every other day. Rotation consists of Wardleys' tropical fish flakes, Hikari sinking and algae wafers, topfin freeze dried tubifex, san francisco bay frozen bloodworms and currently working on hatching brine shrimp using packets form the same company. Question is: do I need to buy cichlid specific food? What is the difference? Convict will come to top to eat and will eat from bottom as well.