I have had these blue zoos for at least a year now and for the past couple weeks they are diappearing. Parameters are all within normal range. Only thing that has changed was replacing my 20k 250w XMs. The onset was before I changed bulbs but nothing has changed since I put the new ones in. I have had some more than desired temp and salinity fluctuations but nothing really drastic.

I did frag it and moved it to another area of the tank. All my other zoos appear to be fine and growing well.

Any ideas/suggestions? :(

Thanks all, Ken