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Problem with polyps, Light?

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unixnum1 View Drop Down
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    Posted: April 22 2020 at 2:26pm
Hi,

I changed my light filters and I'm now seeing some of the polyps go white and look like they are dying.
Does this indicate to much light?
Or not enough.
Unfortunately I don't have a Pars meter to compare.
They have been great since I placed them 3 months ago until I messed with the lights 3 weeks ago.
I have lowered the light to see if that helps but I would like other opinions.
None of my other coral seemed to care.

The circled items are the polyps that are now a grayish white and look closed.


Thanks
220G with 30G sump, SPS/LPS. RoboTank Controller.
=====================================

If life is a bowl of cherry's,
why am I always the stem?

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knowen87 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote knowen87 Quote  Post ReplyReply Direct Link To This Post Posted: April 22 2020 at 5:13pm
When you say change the light filter, do you mean the glass under a metal halide bulb?. I have had issues with zoas closing when my magnesium is low and when I had some rusty pump magnets. What are your tank levels and salinity. 

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unixnum1 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote unixnum1 Quote  Post ReplyReply Direct Link To This Post Posted: April 22 2020 at 6:11pm
I use DIY LED's and I inserted refraction lens's after the LED's to soften and spread the light more.

Salinity=7.2
Temp=75.5
PH=7.7
ORP=348
ALK= 7.0  I know it's a little low.
CA= 410
MG=1360
PO4<.025

220G with 30G sump, SPS/LPS. RoboTank Controller.
=====================================

If life is a bowl of cherry's,
why am I always the stem?

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knowen87 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote knowen87 Quote  Post ReplyReply Direct Link To This Post Posted: April 22 2020 at 7:57pm
7 is a strange number for salinity It should be  1.025 specific gravity or 35ppt. Also how many watts is your whole led light and what percentage of intensity do you keep them at?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote knowen87 Quote  Post ReplyReply Direct Link To This Post Posted: April 22 2020 at 8:05pm
Honestly, I would say that it looks to localized for it to be salinity or lights. Most of those zoas look supper happy. If I had to make a guess it would be predation. Do you have any tangs? I have had two hippo tangs that just decided to take out one type of zoa (ofcourse it was always the most expensive ones). My current sailfin hates zoanthid frags. I would watch to see if it gets worse. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote unixnum1 Quote  Post ReplyReply Direct Link To This Post Posted: April 22 2020 at 10:15pm
Sorry, typo.
Salinity= 1.022

As for the lights, there are a total, across the tank, all 10W LED:
Color:           #LED's:
UV                 12, Don't use.
Blue, 470nm  18
White, 15K    12
Aqua              12
Deep,Red        3

The schedule is in percentage of maximum:
Color   8AM 10AM 12AM 3PM 7PM Night
Blue     5      50      90    75    5     2
White   1      40     75     40    1     0
Aqua    0       5      10      5     0     0
Red      0       5      10      5     0     0

Maximum LED wattage=540W

I don't use UV, I don't know why I put them in.
I only use enough Red/Aqua to bring out color otherwise I get enhanced algae growth

As for tang's I have a few but I have never seen them pick on the Zoa's,
On fact none of the fish or invert's have touched them that I have seen.

Keep the suggestions coming.
Thanks!



220G with 30G sump, SPS/LPS. RoboTank Controller.
=====================================

If life is a bowl of cherry's,
why am I always the stem?

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unixnum1 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote unixnum1 Quote  Post ReplyReply Direct Link To This Post Posted: May 01 2020 at 2:54pm
Update.
I moved the zoas to the bottom of the tank partially hidden under a rock shelf.
The zoas mostly opened.
The ones that looked like they were dying are slowly opening.
The zoas under the ledge are not opening as well  but I guess I need to give them more light.

It's odd that a simple filter would cause such an issue.
I was using 80' lenses on the LED's and decided it was to direct.
So I put on a cracked ice patterned filter to break up the light so it's softer.

That worked as the light looks cleaner.

It's amazing that filter could affect the zoas so much.
Nothing else was affected.

Regards,
Kevin

220G with 30G sump, SPS/LPS. RoboTank Controller.
=====================================

If life is a bowl of cherry's,
why am I always the stem?

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