Leather brown spots

[Shallow Planet]

What is this on my Leather? Doesn't appear to be algea. Is it dead tissue or an infection?

 

[sbash]

Looks like the tissue is dying back. Possibly due to an infection, parasite, or a critter in eating it...

First thing I would do is frag off some of the healthy tissues. The more frags you can make the better, that will give you some 'backup' if the main colony dies back.

Second, post up your water parameters, including ammonia, nitrates, phosphates, ph, salinity, calcium, mag and alk. The more information you can provide the better.

Also what else in the tank, a full tank shot could be useful as well as all inverts and fish you have in there.

If it is an infection or parasite, you are going to need a hospital tank for treatment, so it would be a good idea to get a 10 gallon ready to be fired up...

 

[Shallow Planet]

Thanks I'll post some parameters tonight. It is in a separate frag/QT tank with a few blue legs and astrea snails. Other coral seems fine except I do notice my other leather is not opening today...

 

[Shallow Planet]

Nitrates and Ammonia are 0
Calcium is 405
Alk is 7.7(seems low)
PH is 8.12
Phosphates are 0.04
Temp 78

Galexea, Anthellia, and Duncan's all look great. But 3 leathers are looking sad.

 

[Shallow Planet]

Could too little of flow be a problem? I just have 2 Korallia nanos on it that only put out about 400gph each. I have a Jebao OW-10 on the way.