Cyphastrea bleaching

aidensav · 2026-09-18T13:11:29-0400

Could this be from too much light? Its around the same level as the favites in my tank.

Nitrates: 0
Phosphates: 1.0

20260918_131108_3A9426F8-C5FB-40E0-BF59-9EB8E42C5AD0.png

Baldyreef · 2026-09-18T13:32:38-0400

phosphates are high, I would lower to 0.05 to 0.01, nitrates should be brought up a bit

Baldyreef · 2026-09-18T13:33:23-0400

would light level would you say its in? low, moderate, high?

aidensav · 2026-09-18T13:59:49-0400

Baldyreef said:
would light level would you say its in? low, moderate, high?

Probably low-moderate.

Baldyreef · 2026-09-18T14:07:26-0400

aidensav said:
Probably low-moderate.

great! then it is most likely the high phosphates and no nitrates

Mr. Mojo Rising · 2026-09-18T14:08:14-0400

low and high light are subjective, some consider 150 par to be high light, in my tank thats low light, know what I mean. Better to give all the details if you can; type of lighting, what do you have for flow, what are the parameters? What you are showing us can be from anything, so more info is better. Full tank pictures are also very helpful

aidensav · 2026-09-18T16:06:45-0400

Mr. Mojo Rising said:
low and high light are subjective, some consider 150 par to be high light, in my tank thats low light, know what I mean. Better to give all the details if you can; type of lighting, what do you have for flow, what are the parameters? What you are showing us can be from anything, so more info is better. Full tank pictures are also very helpful

agreed. Tank is a little cloudy with a coral grow from AI on 66%. Flow is SLW-5 jecod with syncra 0.5 silent. Its weird that the exact spot a crab was sitting on for a day is bleached.

Rest of the params are
calcium: 400
alk: 10

Both have been stable