fading sps

[Jim Barry]

This problem is also effecting my montipora. They have all died as well. It was very noticeable on my digitata, they faded really quickly.

The polyps are extended on all sps, they appear to be healthy, albeit fading. I am using IO salt, and do a 30 gallon water change every 2 weeks.

I have a 40" becket skimmer (one of Dez's) that does a great job. I also use 100 micron filter socks on my 2 drain lines to my sump which pulls out most particulate. The water clarity is very good.