thanks for the info, kpk.
teen, the tank is an extremely overstocked and crowded messed up situation. it is a 90gal aggressive tank with a crappy seaclone skimmer that pulls nothing out.
the stock list(yikes):
volitan lion, snowflake eel, panther grouper, spotted grouper, flame hawk, yellow-tail damsel
nothing on or in this tank was my decision, and i'm trying to fix the situation. the tank obviously has algae, pH, alk, nitrate issues.
my plans include: trading the volitan for fuzzy dwarf, pulling both groupers, adding a dwarf angel, different skimmer, adding a sump, and possibly going bare-bottom.
any other ideas would be appreciated.