I've been fighting a problem like this for over a year now.....I had a tank full of sweet acros along with an anemone, cabbage leather, toadstool leather, some zoos, and a bunch of GSP.
One day I noticed that the cross piece on my trim up top had completely broken free and now the tank was bowing out alot. So I clamped the tank, all was ok.
I got the replacement part and set a side a day to drain the tank and replace the top trim.
At the same time I made the decission to change my lighting set up( I didnt like the cheap reflector I was using) and I also changed my salt from kent to tropic marin.
The work went fine, all was well. Then just a few days later I began to notice that the acros were beginning to lose tissue on the tips...I just assumed this was from air exposure for the hour it took to do the work. But as the days went on things got worse.....panic set in.
My fish were fine, softies were fine but the zoos started to suffer as well, then the anemone moved into a shaded area........what was going on?
I couldnt figure it out. Needless to say all the sps died...it sucked....so I left everything else in there for several months....all the fish looked good.
Then I tried another couple of frags of sps...they died in 3 days.
So I stripped down the tank, removed all the sand and sifted through it, someone had told me to check for a penny. Nothing was found......so I rebuilt the tank added some new sand and a few new rocks and let the tank cycle again.
Then I added some more sps....guess what? They were doing ok.....until 3 days ago......I removed some glass pieces I had on top of the tank for cleaning(about 30 minutes) and not even an hour later some of the sps were dumping tissue again....now I have several frags that are suffering. I attribute this to too much light....I'm probably wrong but what else do I have to blame?
I moved my lights way up and shortened the time the lights are on....we'll see what happens.
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