Montipora is bleaching!

[nudifun]

So within a 24 hour period my montipora went from green to brown to almost completely bleached white with only a few brown areas and polyps left/showing.

I checked my parameters:
Ammonia: 0
Nitrate: >5ppm
Calcium: 400ppm
KH: 10
PH: 8.2
Cu: 0
Ph: 0
Sg: 1.026

I have had it for about 2 months without issue. My light fixture is a WavePoint 24" 96watt HO with 2x12k and 2xactinic (bulbs are 6 months old)
Tank is a 20 gallon high. I originally had the Monti at the high end of the tank, 4 inches from the water surface. I had to move it to the middle of the tank though about 3 weeks ago because I moved a bunch of live rock from it to another tank I'm cycling. It was fine looking until three days ago when it bleached almost completely overnight! Any Ideas????

 

[alexx2208]

How many hours a day are the lights on, if there on longer than 8 hrs a day, get new bulbs, probably lost their kelvin rating, or get LEDs, you'll probably invest $150-200 in bulbs, or get a $400 hydra from AI or $400 max spect and NEVER change it for 5-8 years.

Max spect has integrated controller with automated ramping, AI you need a controller, but it has cloud cover and lightning