Please help with AP700 Kessil Lighting schedule

[feadk]

Hi,
I am running with my new LPS tank for almost 4months, and I noticed there's something wrong with my brain corals(bleaching).
recent test: No3->2 | Po4-> nearly zero | KH->9.9
and I feed coral every week

So I am wondering if I am setting my light right.
My ap700 currently turns on at 10:50 and runs up to 55% at 13:00, then goes down to 23% at 19:00, turns off at 23:00.

Can someone please give me an advice or share me their ap700 lighting schedule?
Much appreciated! and please forgive my English:downcast-face-with-sweat:
Thank you!!

Here are two pics of my bleaching corals.

 

[blaxsun]

Do you have any PAR readings from your tank?

 

[feadk]

Do you have any PAR readings from your tank?

I don't have it:downcast-face-with-sweat:

 

[feadk]

Here's the PAR reading of my tank, I think it's a bit low at the moment, but I dont know how high should I set..
any suggestion?

 

[TangerineSpeedo]

The Par does not seem to be terrible for LPS. I would look into flow. make sure you have a good random flow pattern across the whole tank. Also run some carbon might help and make sure no one is stinging anyone else.

 

[feadk]

The Par does not seem to be terrible for LPS. I would look into flow. make sure you have a good random flow pattern across the whole tank. Also run some carbon might help and make sure no one is stinging anyone else.

Thx much!