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
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

 

[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!