So upon testing my water, my pH was a bit low (7.8ish), so I decided to try some Proper pH stuff. Upon putting it in the tank, my starfish and snails got all pissed off, and all my corals closed up. My zoos all have this white film looking stuff on them and only a couple polyps are slightly open. My green anchor isn't open like it was before the pH stuff. Same with the button polyps. My starfish isn't moving like it was before (it was all over the place), nor are my snails. The fish and shrimp are all fine and swimming around like before. Feather duster is open as well. Any ideas on what I could do? My pH is back to 7.8 btw No ammonia or nitrites, SG is 1.023 (I'm going to go get a refractometer, just found my tax return in my checking acct:whstlr: ), nitrates are about 10ppm. Is a heater necessary? I have it in a room where the temp doesn't vary all that much, the LFS didn't say anything about it. Any ideas on why my corals are unhappy, while everything else is fine?