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Hammer coral bleaching

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Any ideas why my hammer is bleaching but only half of the heads? Tanks been running around 18 months and all parameters seem fine. Hammers been in the tank about 12 months and has previously grown about 6 heads.

Paddone

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Reply #1

Have you considered coral aggression from a neighbouring coral up flow from the coral that’s bleaching? Something with sweeper tentacles could be stinging it.

Paddone

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Reply #2


deano123

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Reply #3

Thanks for the reply. Yeah thought that at first  so moved it well away from anything else but still the same

Paddone

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Reply #4

Pic would help to see the distribution of bleaching. Has in continued to develop in the same location since you moved it?

deano123

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Reply #5

Can't seem to find an option to upload a picture? Any ideas?

Paddone

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Reply #6

The photo function is down atm, I have been uploading via this but you have to create a free account:

https://postimg.org

deano123

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Reply #7


HK_Fuey

  • Graeme
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Reply #8

Yes, it worked.

Have you had temperature fluctuations by any chance?  Are your other parameters all in check and stable?  What about increase in lighting?

HK_Fuey

  • Graeme
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Reply #9

Just seen this thread:
https://reefbase.co.uk/lighting-18/lighting-5214/msg61080/#msg61080

That's most likely the issue.

deano123

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Reply #10

Yeah seems to be since changing my lights thinking about it. Any suggestions?

Paddone

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Reply #11

Put the coral at the bottom of the tank and near the edge where the light intensity will usually be lower. Also consider reducing the intensity of your lights especially uv if you have a programmable setting for uv.

The reason for bleaching is that the micro organisms living inside the coral which photosynthesise die off under too too high light intensity. As long as some remain alive and you reduce the corals exposure they will reproduce and the colour will come back.

Thanks:


HK_Fuey

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Reply #12

Target feed it too, to keep it's energy levels up.  Without the algae internally, it will not be photosynthesising, and producing sugars to feed itself.

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deano123

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Reply #13

Thanks I'll do that and I've turned all 3 channels on the light right down

HK_Fuey

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Reply #14

Just gradually increase it once things settle down

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