Frank buddy, I dont mean to be the spelling & grammar police, but posting like your texting is giving me a headache. lol. To alot of people a more defined question/post will get more defined response. I not trying to de-rail or flame you, just simply offering an opinion. For me to reply 'fish r good' would fit the question, but not be really helpful, know what I mean? anyways back on track....... There are lots of different fish that serve different roles. Tangs and foxfaces for example are good algae eaters. Some blennies are good are picking at algae too. Some gobies are good gravel sifters. Dont necessarily plan to rely exclusively on fish to perform a certain role. A well rounded clean up crew is going to make you alot more more in terms of thier role. Its going to depend on your goal with the tank as well. For me a 220 would hold a larger collection of eye pleasing fish, or either a few larger fish, which in both cases is going to rely on a CuC more than the role the fish play.