Spot Recession on acros and LPS

[Xenia_Princess]

Recently I lost a few LPS colonies and my SPS were having either tips receed or patches around the coral.

Here are some things that changed

I did not have a skimmer for about 2 weeks as I sold my other one to go with a Hurricone. (Im thinking there was a sudden nutrient drop??)

I do carbon dosing, with brightwell products.

PH 8.0-8.3
Alk 7-8.5
Nitrate 0-5
Nitrite 0
Ammonia 0
Calcium 400-420
Mag 1200-1300

ORA Pearlberry Tips receeded.
Maricultured Stag(Patches missing)
Pokerstar monti, patches missing
Superman Monit Patches missing
Alien Eye Chalice Gone
Red Chalice Close to gone
Some brains bleached in areas

Everything else in the tank about 30 corals are fine. The only thing that really chanced was I was skimmerless for 2 weeks and the new skimmer was really pulling some nasty stuff out.

 

[Xenia_Princess]

Forgot to mention I also added about 8 new fish and lost 1.

 

[Xenia_Princess]

System is 220 gallons with a 75 gallon sump

 

[NewSchool04]

patches around the coral sounds like AEFL (acro eating flat worms) They can devastate a tank.

 

[Xenia_Princess]

anyone else I haven't added any new acros, do they eat monti's?

Another thing I was thinking which was dumb on my part is I was feeding coral food from the same container that I put my alk and calcium in

 

[Xenia_Princess]

anyone have any ideas why some colonies still look amazing and other lps and sps look like crap

 

[Mako]

AEFW don't mess with Monti's or chalice so I don't think that is your problem. Still could be some other bug though. You might want to take an affected coral out and do a dip in TMPCC or Revive and see what pops off if anything.

What is your PO4 reading? I didnt see that listed.

 

[Sig45]

I have/had this problem when I started Zeo system. Established frags (mostly branching monti's some acros) developed loss of tissue near base/body. Some spotty tip recession. This is apparently due to nutrient 'shock' from depleting PO4 and nitrates. Your situation sounds similar.
My experience is that the tissue stabilizes and recovers. I have one slimer that is nearly completely recovered in ~8 weeks. Just got a nice green branching monti that did the same. Now stabilizing and beginning recovery.

 

[Xenia_Princess]

it seems like a lot of the acro's are starting to come back(others were not affected). However the LPS that experience damaged tissues are not going to recover.

I think you are right though, the suddent drop in nutrients must have shocked them. I checked my alk and cal/mag today and they were quite low...Going to look into automating the dosing. Does anyone have suggestions for a good system. 2 part is just to hectic for me...I finally got my top off automated.