Ive read all of what you posted, and thanks for posting it as its informative for others, but I know every single piece of information you just told me back to front. Trust me, I researched all of this, and put a hell of a lot of time in to it. The lighting I have on the tank is 8 T5HO globes, plenty of light. I know tangs need a lot of room to swim, with minimum tanks of 4 foot even 6 foot. But a scopas tang is one of the smallest tangs there is, and its also tiny at the moment and ive got plans for a bigger tank already. Im a member of MASA, which I said on the very first line of this thread. I view the forums every single day looking and reading. Nothing is random about what im buying, ive thought all of it through. And to be honest, theres hundreds of opinions on who thinks which way is better. Bioballs, DSBs, skimmers, canisters etc etc. Theres a huge trend for fuges in sumps these days, but bioball setups still work perfectly fine.