SPS issues, flatworms? disease?

[toddmau5]

I noticed a few corals were looking a little odd but still had polyp extension. First thing i noticed was my large blue millie, is, no longer blue. Then I started looking around the tank more and started noticing spots on some of the acros. I have dipped the ones that I can remove a few times, and have never seen anything come off of them. I usually inspect them pretty close when I have them out of the tank to dip. The weird thing is I had an odd die off, three cyphastreas first, then all my chalices. The sps had seemed unaffected up until now. the corals still look relatively happy aside from the white spots, minus the millies that just look really miserable. If you could take a look at the pictures and let me know what I could be dealing with?
http://imgur.com/a/mJdrz#xgLIKCG

 

[sahin]

I had a look at the photos. Photos arent the clearest, but I make out two issues:

1. Potential Acro Eating Flatworm issue: on two acro photos I see what appears to be bitemarks.

2. On one of the photos I see what looks like either RTN or something has eaten a small section of the acro; it could also be that a tip may have been crushed during tank cleaning etc giving the appearance of the damage.

Some of your LPS corals dying suggests there might also be issues with your water. I would check the following are in order:

1. Specfic Gravity; check that it isnt too low or to high; have your refractometer calibrated with a standard solution (but double check with someone else or LFS, as standards can sometimes be messed up too...)

2. Check Alk/Ca/Mg are in order

 

[toddmau5]

I thought they looked like bite marks. I can't for the life of me ever see anything. I've dipped the hell out of everything before it went into the tank, I've dipped everything that could be removed that started to show signs, flatworm exit, you name it. But I can't ever find a single worm or bug despite the bite marks thats why I was wondering if it could be some sort of disease. There was an alk dip for one day back in March, and I thought that might be why the lps all took a turn for the worse. They rtn'd really fast tho. Since then the CA reactor has been holding steady and water parameters are all right where they should be. Refractometer gets calibrated once a month.

 

[rt67ghy]

After your lps died did you run GAC?

 

[toddmau5]

Non of them died in the tank, once they started to rtn I pulled them, tried to dip and they went into a qt tank. Carbon was offline for about a week waiting for a new o ring but I usually try to keep the carbon running