I'm not really all that new, but I seem to have nothing but problems. To make it short, I had equipment failure about 4 or 5 months ago due to an electrical storm and everything in the tank died (I was out of town). The tank was drained, new sand was put in, the live rock was scrubbed, and then we let the tank cycle a few weeks. I slowly added some coral, some were ok, some didn't make it, I eventually added snails (I had some surviving snails already in the tank from before) and shrimp (two big ones with claws, 2 blood shrimp, and 4 cleaners), and they all died, some of the snails died as well, I put 3 fishes in total, two clownfish and one coral beauty, only one of the clowns survived (he's doing pretty well, but the other two died within 24 hours). As I continued to add coral, some didn't do as well, some did, however, since last night, everything (except the clownfish) is looking pretty bad, a couple of corals have already died. They've tested the water and it tests fine, the salinity is a little high (between 1.026 and 1.028), my service guy uses natural sea water, the chiller is working so the temperature is anywhere between 77 and 78 degrees. Some suggested that there may be an oversaturation of something maybe in the rocks which is causing all this damage, is this even possible? Does anybody have any ideas? Thanks