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07/22/2018, 01:06 PM | #1 |
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Purple Tipped Across Slow Whiting from Core
Hi,
I have these purple tipped acro’s, several colonies of the same thing - for 2.5 years I’ve been propagating them in this tank. Over the past 3-4 months they’ve slowed their growth and starting whiting out from the core out. They are not bleached out dead - still have active polyps down in the white. Everything else (20+ species of coral) are doing fine, but these acro’s are hurting at all spots in the tank. Data: Apex Controller. Phosphates, 0.00 via Hanna. nitrates 1.0. Temp maintained 78.1-78.9, pH 8.1. PAR at 200 (near this colony) peak for 9 hours, lower level PAR for 2 additional hours. It hs always liked that level PAR. Salinity 34.5, dKH 12, Calcium 410. Regular water change via Apex DOS. Feeding is a mix of calanus, reefroids, mysis, oyster feast, flake food. My guess is not enough feeding - I have really stepped it up to twice a day a lot of variety with target feeding, from every 2-3 days (and no target). |
07/22/2018, 01:35 PM | #2 |
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Any other thoughts on reasons for whiting out from the core out, but still polyps, and not fully bleached - and only the one coral type.
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07/22/2018, 04:40 PM | #3 |
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shading ??...are you running 100% L.E.D.
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Please don't feed the bears because the bears will become dependent on free handouts and forget how to take care of themselves …... Current Tank Info: 75 Gal. Mixed reef mostly sps |
07/22/2018, 10:06 PM | #4 |
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Not shading - these five colonies have clear access to the top of the tank. New info: inspected closely and found three asterina star on one of the cores that is in trouble. Hmmm...
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07/23/2018, 04:45 AM | #5 | |
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Quote:
Many people are finding that with low nutrient levels that they can't maintain the high alk like you are running..
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07/23/2018, 06:23 AM | #6 |
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I second that asterina comment. Except for a select few situations.
You alk at 12 and nitrates at 1 and po4 0 is not helping you. If the change happened slowly over weeks then I would say nutrients are too low. How long have you ran the tank with alk around 12? |
07/23/2018, 07:10 AM | #7 |
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+3 asterinas are not the cause, they are just cleaning up the mess,
my guess is lack of food/flow/light or alk/temp swings, also could be acro parasites if you did not quarantine |
07/23/2018, 08:09 PM | #8 |
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Anyone have other posts or docs I can read on the high alk and low nutrient badness - that’s a newer one for me. I’ll bring down the alk to 10 over the week.
Good to hear on the asterina - they had never caused a problem in the past, but makes sense they were on the coral as cleanup, not likely the cause. |
07/23/2018, 08:10 PM | #9 |
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Been running that way alk-wise for a year. But had been cutting back on feeding, and I think i got too low. The whole high alk and low nutrient being a problem is a new one for me - definitely gotta read up there.
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07/24/2018, 04:43 AM | #10 |
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I haven't really seen a single article on the low nutrient/high alk issue.. Just multiple peoples reports/what worked for them..
Don't lower alk too fast.. Slowly let it drop over the next few weeks.. Slower the better.. Don't want to stress it anymore..
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