wow, 100 gallon quarantine?
I have a small piece of live rock in there... originally it was COVERED in hair algae, but the little guy picked it clean. I have been putting in small, 1"x1" strips of nori (from the korean store for $1.98) and similar sized pieces of sea veggies from julian sprung (costs $12 a pack, for 1/5 the volume of nori @ the korean store!)... I put in the nori/seaveggies twice a day (so, a 2" square of seaweed per day) and I feed a miniscule amount of frozen formula 1...
I cant tell which stuff the tang likes better... so I just keep mixing it up.
On another topic, how much should I be feeding the tang per day?