Tissue death from base up

[BriGuy31+]

I have read some threads on here but I am still worried that I don't know the cause of my problem. Tissue death on three of my frags/colonies. These corals have been with me for a while now. The smallest frag pictures only a few months but the others at least a year and a half. The purple monster tissue death progression seems to have stopped and even seems to be healing so I thought it was some light issue(i.e-laying on it's side and blocking the light). Now my Blue Hoeki has went downhill pretty fast. I would say within a week or maybe two at the most. I just added a phosphate reactor and carbon about three weeks ago. I had some hair algae issues. I used the recommended amounts from BFS. Do you think the phosphates dropped too quickly? I don't test for everything, but here is what I do test for:
Alk-9.6
Cal.-410
Sal.-1.026
Mag 1300

I have a 50g cube. MP20 at about 80% and AquaIlluminations LED that has been in use for about 3 months. Overall most of my other SPS has shown decreased polyp extension. I am trying to give as much info as possible but I know that isn't saying too much. Here are some pictures to help. I hope that somebody can help me. I have already written off the Blue Hoeki, should I just remove it from the tank? I have kept it it help DX the issue. I have coralRX that I could dip with if you guys think that would help. I'm not sure if my problem is a parasite(none seen,yet), chemical, or environmental. Please help me out if you can. Thank you.

 

[96gts]

You must be using too much GFO, I had the same problem when I started using GFO for the first time. Some of my SPS especially Milli RTN.

 

[BriGuy31+]

You must be using too much GFO, I had the same problem when I started using GFO for the first time. Some of my SPS especially Milli RTN.

Thank you. I started on the conservative side of the recommended dose of 0.78 cups of granular GFO from Bulkreef supply. I will remove half of that.

 

[BriGuy31+]

Thank you everybody for helping my DX this issue. I received my Hanna Checker today. My phosphates tested at 0.05. I know zero is the best number but what is there to say about this number? Keep in mind that I AM running a reactor. I am surprised that this number is not lower. I will test again tonight to confirm.

I have about 15 large frags and some that could be considered a colony. I guess per square inch that may be a lot with a 24x24x20" cube.

I dipped the Hoeki. All I noticed was two worm looking things. It was not an AEFW because I've seen them before. This was exactly like a sewing thread and light red in color. It was about 3mm or so. It was so small that I couldn't get a good picture.

 

[uchin]

you have any temp or alk swing?

 

[BriGuy31+]

you have any temp or alk swing?

No, I did not. I only test about once a month but nothing changed unless it corrected itself. I plan to test more often now :)

 

[uchin]

i had stn in my led frag tank last month bc of low temp at night and low alk. led light put out almost no heat so you have to watch your temp.

 

[BriGuy31+]

i had stn in my led frag tank last month bc of low temp at night and low alk. led light put out almost no heat so you have to watch your temp.

This is a great tip. I checked my temp during daytime yesterday and it was 76. It usually reads about 80-81 with MH. I bumped up the heater and I will watch it more closely. Thank you.

 

[Lazys Coral House]

Just curious BriGuy31+, what kind of salt do you use. Not saying there is any relation just wondering.

 

[BriGuy31+]

I use Reef Crystals.

 

[Lazys Coral House]

Thanks