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10/14/2020, 07:08 AM | #1 |
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Join Date: Sep 2013
Location: South Africa(Best country EVER)
Posts: 4
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Logo receding at night
Hi Guys,
Normally don't post on here but I'm in need of a bit of help. I enjoy lps with lobophylia being one of my favorite. My problem is during the day the corals do extend but ad soon as the lights go out at night it recedes so badly it looks like it's going to tear through the flesh Its a recent occurrence with the following tank parameters Temp. 25 Ph 7.93- 8.02 No3 10 Alk 10.2 Mag unsure Cal 510 Could the high no3 be the problem?? Thanks in advance |
10/14/2020, 09:29 PM | #2 |
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Join Date: Nov 2003
Posts: 2,020
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While your water chemistry might need work (good to get a mag test), it's not unusual for them to react to light shifts. If you come back several hours later in total darkness with a flashlight, I'm curious if you see it somewhat expanded again with tentacles extended.
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10/14/2020, 09:42 PM | #3 | |
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Join Date: Aug 2019
Posts: 441
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Logo receding at night
Quote:
Is it not normal for polyps to recede in corals overnight? Most of my corals, especially my digitatas, stylos, and zoas, retract their polyps at night and are open within an hour of the lights coming on. I’ve yet to find any evidence of pests which was my first thought before I assumed it was normal. Edit: photos to show what I mean This is what my tank looks like every night. Last edited by djryan2000; 10/14/2020 at 10:37 PM. |
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10/15/2020, 12:55 AM | #4 | |
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Join Date: Sep 2013
Location: South Africa(Best country EVER)
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Quote:
Yes , 2 hours later its up again, so weird. |
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10/15/2020, 12:23 PM | #5 |
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Join Date: Nov 2003
Posts: 2,020
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If your readings are in parts per million, the nitrate is not terrible, nor are the other readings, but the Mag is useful to know as it can give an indication of how well your corals can process and use the water chemistry. I like Salifert kits.
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