Like what kind of pests? I actually like the inverts more than i like the fish.. so any little critters running around i'm cool with. But if they aren't reef safe then i'll eradicate them. Also.. my tank isn't that big and i want a fish that swims in the column. I was thinking maybe some type of chromis.. but still.. i'm trying to stick to some really small fish because i want as small a bioload as can be, while still being able to keep the tanks' nitrifying bacteria.
My reason being.. i'm going to be housing lots of coral and really don't want anything that could cause a real spike in my parameters. Nothing messy and nothing with a big bioload. I want the highest water quality i can get while still having fish.