I'm in the process of cycling my 12g nano. I've added microbacter7, to prevent any spikes. Yesterday I added 2 green chromis. They did very well for ~5 hours. Then I shut the lights off, and they bolted into the live rock. They didn't come back out all night, then this morning they looked terrible. One had dark splotches all over his body. Both were gasping for breath. The one with the splotches died soon after, but the splotches disappeared upon death. I'm afraid it has something to do with my live rock; I got it from my lfs
which I later heard horror stories about. I had already added the chromis (from a reputable lfs
). I removed the rock, and manually oxygenated the water and dropped the temp 2 degrees down to 78. I checked my params today:
This chromis that is still alive has good color, but is still gasping. I feel terrible I don't know what else I can do. Help?