[justinl]

Originally Posted by tgoeujon

the tank is a 55 gallon, been up and running for approx. a year and a half. sand bed is 4" deep. i change 10 gallons every 2 weeks ( instant ocean). i dose with iodine, coral accel, strontium and molybdenum, purple up, liquid reactor, i stick to dosing instructions on the bottles. i lost a regal tang, yellow tang, 6 line wrasse, 2 chromis, blue devil, yellow damsel, domino damsel, saddled toby puffer, diadiem dottyback, black percula and salarias blenny. parameters are salinity 1.023, ammonia 0, nitrites 0, nitrates 5, ph 8.2, temp 80

well personally i think it was overstocked, but that probably wasn't the reason. at least not directly. Did you notice any parasites or disease symptoms? overstocking stress might have made them more vulnerable to a fast acting pathogen of some sort.

do you test for what you dose (and my, what a list you have there) or just follow directions on the bottle? what do you test your salinity with? hydrometer? refractometer?