Rtn and stn with chalice, acan, favia?

[Madreef]

Has anyone experienced anything like this?

I have a 150 mixed reef; it is lit by 8x54w t5s about 14" off a 24" tall tank. They run for 7 hours a day. In the last week or so I have noticed several of my lps receding. Some at rapid rates others slowly or just recently. I did notice tonight my gfo barely having any water movement through it. I also did a 10g WC and replaced carbon(both would normally be done. Sps look a little on the brown side but are coloring up, growing, and the tank is 4 months old so I'm not expecting a whole lot out of them as far as color and growth yet. I'm just looking for a cause or any ideas about the tissue recession on the lps. I've never had a problem with lps before this. Not really any new corals added to the tank. I did add about 9 anthias to the tank a week ago but the stn started before I added the fish. I was vodka dosing 2.3 ml of vodka and I've stopped as of 2 days ago. I use brs 3 part via BM doser and kalk in top off water.


Last test I was
7dkh(raising to 8)
390ppm ca
1300 mag
Ph 8.3
Ammonia 0
Nitrate 0
Nitrite 0

TIA

 

[wrasseluver]

What are your phosphates?

 

[Acroholic]

Are you running a denitrator?

 

[Madreef]

Phosphates are clear with the saifert, I am using 0tds rodi and tropic Marin salt. I'll be testing phosphates with a Hannah soon; but I doubt they are the culprit. I have been keeping corals a long time and I've never seen this kind of recession before. I havent changed any of my normal tank habits. I'm stumped at the moment.

 

[Madreef]

Are you running a denitrator?

Nope, I was using vodka for nutrient control to try and get better color out of the sps. I've also cut the photoperiod half an hour about a week ago; but I can't imagine a lighting decrease causing this kind of recession.

 

[Acroholic]

Nope, I was using vodka for nutrient control to try and get better color out of the sps. I've also cut the photoperiod half an hour about a week ago; but I can't imagine a lighting decrease causing this kind of recession.

I has symptoms very similar to yours, with the addition of the symptoms with SPS as well, and I think the culprit on mine was a sulfur denitrator I did not properly maintain. It was basically pumping H2S into my system for an extended period of time. A stagnant DSB could do the same thing. Just throwing out possibilities.

 

[Madreef]

The tank, lr and equipment is pretty new; I have a bb refugium run on opposite light cycle as the display. I think it was mostly due to vodka dosing, as most of it has stopped since I stopped dosing. The Hannah measured my DT phosphate at .23; so that's high but not totally unexpected. I can't really imagine po4 having a negative effect on lps growth at that level; brown acros yes, so I'm going to stay away from dosing vodka for now and keep lowering po4 with gfo.

Hopefully this problem starts going in the other direction as is affecting some of my favorite corals. This issue is having me rethink my mixed reef. SPS here I come!

 

[The Wrong Reefer]

Bump

Trolling the boards and came across this post...
Just curious, did cutting back on the vodka dosing solve the issue? I am also vodka dosing currently, and I'm experiencing the same issue here, lost 5 acan colonies, 3 chalices, a favia and counting... all my parameters are when I test. My SPS look aces and are growing. Larger LPS showpieces are doing okay, mainly its chalice, acans, favia, and some of my zoas look crummy.