Sps health question with pics

[swk]

Hello all. Here's a pic of a piece I got at a club meet a couple weeks ago. I'm still not real good at what looks like what with sps. Specifically growth vs issues. Here's a pic.



The spot I'm referring to is on the 2 branches on the right. The bump where the polyps come out of (corallites?) has begun to lighten over the past couple days. Is this growth, or something more insidious?

Here's a full tank shot, followed by a cliffs note version of my tank and routine



Details

75 gal display with 20 long sump. 80 gal total system volume. RO nwb 150 skimmer. Fuge with dsb, caulerpa, chaeto and others. Mag 5 return pump

Fish list:
Cherub angel (well behaved I swear)
3 bartlets anthias
Algae Blenny
6 line
Clownfish
Scopas tang
Tomini tang


Flow is mp40 on lagoon mode about 80% and a wp25 on else mode. Pretty good gyre with one pump at front and one at the back of the opposite end of the tank? Is this enough, or should I allow them to collide and make some more random flow patterns?

Lighting is a 6x54 sunpower with 4 b+ and 2 coral+

2 bulbs on 12-2
All bulbs on 2-830
2 bulbs 830 - 10

Calcium and alk is maintained by saturated kalk in ato
I dose 23 ml of vinegar a day via brs doser and timer. GAC and Gfo via reactor.

Last test results as of last weekend

Sg - 1.026
Ph 8.2
Alk 7.7
Calcium 430
Mag 1320
No3 .5ppm
Po4 .03 via Red Sea always reads 0 on standard hanna checker

Water changes every 2 weeks. 10 gallons with blue bucket Red Sea salt.

Thank you all!!!

Excuse the blue iPhone pics. Doesn't represent true color whatsoever

 

[swk]

::chip chip::

Crickets....lol

 

[tilo]

Need a little better pics.

Probably growth, the piece will begin to grow new branches from those corallites that you see whitening a little. You should still see flesh and eventually new polyps extending from those nubs.

Are you still getting polyp extension?

 

[swk]

Need a little better pics.

Probably growth, the piece will begin to grow new branches from those corallites that you see whitening a little. You should still see flesh and eventually new polyps extending from those nubs.

Are you still getting polyp extension?

Thanks for your response.

Yes still getting pe throughout the piece and still on those coralites that are turning white.

I will do my best to get some clearer pics with a better camera.

How does my flow setup sound to you?

 

[tilo]

Well I'm an "old fashioned" kinda guy when it comes to flow so of course I would say, have them colliding to put more variance in the flow patterns.

But, this is also a method that was before MP40's and WP25's were so popular and gave you the ability to adjust so many features in flow pattern.

With this said, it does seem like enough flow with your Mp at 80% and I'm guessing your WP clicking on every few seconds.
What I like to do is just look at each sps and watch the polyps. I like for them to move or sway randomly and don't like for them to be constantly pinned in one direction or stagnant.

 

[tilo]

I should add that it seems like enough flow to have these corals flourish in your system granted you keep providing quality water and lighting,

but when they start to become colonies I do believe you will need more flow for sure :beer:

I believe your experiencing growth on that piece but would feel more comfortable giving you an answer after a better pic so will wait and see.

 

[swk]

Thank you soooo much for your opinion. I really appreciate your input