fading sps

[Jim Barry]

I have been having problems over the past few months with my acro colonies and frags slowly fading in color. When I get them they are nicely colored and then slowly fade until they are white and dead. They are not bleaching from the tip or base but rather an overall slow fading in color.

I have 3 - 250w 10,000k Ushios and 4 vho actinics across a span of 5' and a depth of 24". The actinics are on from 7 AM until 10 PM and the Halides are on from 1 PM until 9 PM. The bulbs are 8" from the surface.

I have a chiller to maintain temp, good flow and calcium reactor to maintain alk at 10 and calcium around 400.

Water perameters are fine except my iodine has been extremely high due to an overdosing mistake. I have done numerous water changes in my 190 tank and can't reduce the iodine levels. I think it has been absorbed into the live rock. The livestock is fine and the lps and softies are fine, although could be better.

Can high iodine levels cause this kind of fading in acros? Is there a product available to reduce high iodine levels. Could my lighting produce this kind of effect?

I am at my wits end and have lost waay too many acros over the past few months.

I appreciate any advice.....

Jim