SPS problems

[bct15]

None of those fish are problematic towards sps, except tangs sometimes but I doubt it is the problem. If the fish are not the problem then the next thing I'd look for is pests. If you can remove a couple frags and examine them under a magnifying glass that would be ideal.

The symptoms you are describing bring two things to mind for me, red bugs and/or high phosphates. Both will cause acros to have little to no PE and to brown out, but not necessarily kill them.

 

[Badfish83]

You could possibly have too low of nutrients if your phosphate is running at .00

 

[CoryC]

i have bayer dipped every acro. my sources do the same. i will check though. i was thinking about upping my feeding as well. going to do a wc tonight.

 

[CoryC]

did a water change. i never let the salt mix for days because it always ends up producing a residue on the top of the water and bucket. but did you know fresh mixed RC's is like 10 dkh?

 

[Magicalmets]

I agree with badfish. You may have low Nutrients. About 3 weeks ago I starting feeding my tank daily with Dr G food and am very express with the results. I see color improvement everyday.

 

[cee]

Cory,
First, if you're trying to run a ULNS, you would be better off running Alk. near NSW levels. I shoot for 8.0 and everything seems happy there. Second, boost your Ca up to 420 or so. Third, poor color on montis is almost always a sign of low potassium. There used to be test kits made by Merck for this but I don't know if they're still available. Dosing trace elements can help to restore those levels as well but that's a mixed bag. One thing not mentioned is flow; too low and your corals won't be happy and that stress could cause what you're describing. Change one thing at a time, give it a week, evaluate, and repeat until you've found the problem.