Too much light?

[dlux5life]

Hey guys-

Posting a couple pics of my coral that seem to be losing coloration, specifically in areas that would be receiving the most light.

They’re not losing their tissue, so much as their coloration. They’re concern is that it will lead to tissue loss.

Hoping to get some opinions. Alk has been steady, albeit a little low at about 7-7.5 dkh. Ph has been rock solid around 8.3 and coral growth has been pretty solid.

I have 4 quanta helix pros, about 18” above the water. Working on getting the clubs par meter to confirm.

Would love other’s thoughts on this. I know it can be a tough thing to gauge by pictures.

 

[Cpage101]

salinity and magnesium levels?

 

[dlux5life]

1.026 and mag is 1475

 

[dlux5life]

I should mention that I am picking up one of the clubs par meters, likely this weekend.

 

[Reefried]

It’s tough to tell by the pictures. Those corals do not look to me like they are getting too much light.

For years with SPS typically corals turning white meant too much light, and browner meant too little. But in the last ten years or so, or more likely when people moved to mostly LED’s it’s not always the case. I have put corals in high light areas that I thought they would love, and they didn’t like it, but they didn’t turn white, or “bleach” they turned duller, and almost grey-ish. I moved them to lower light areas and they came back quickly. I have some SPS sitting at 175 par and they look amazing.

What are your nutrient levels? I have experienced that low nutrients and high par is not a good mix.

I am curious to what numbers you get with the par meter. I would bet your tank is getting about a 225-250ish numbers at the high light areas and 150-180 in the low light areas.

 

[Swordsman82]

What are your Nitrate and Phosphate levels?