Tank has been set up for about three months. No nothing different the tangs all died after being in the tank for about three days and two of the percs were in there for about two weeks but remember the percs died four weeks after the tangs... He has two powerheads w/ venturi running a rena fillstar xp 3 rated up 175 gallons it is a 90 gallon tan. Prizm pro skimer 40 lbs of rock, doing 10% water changes weekly with ro water and osmoprep adding iodine and cycle weekly. Instant ocean salt @ 1.023 pH 8.4 , ammonia = 0, nitrite = 0, nitrate = 20, 30 lbs live sand and aragonite, 77 degrees F oh yeah and no ... no real signs of illness... he did note however that at night the clowns would kind of burrow themselves into the sand bed and in the morning after the lights were on they would come out and have white spots like ich BUT the spots would go away within six hours or so and they ate fine and seemed healthy (as well as the tangs)

sigh... i think thats it... thanks for helping