Galaxia and green Button Polyp bleaching

[MHG]

I have two nice colonies of Galaxia and Green Button Polyp on the sand on my 24" deep tank. I was running 48 LED's. Royal Blues at 70% and Cool Whites at 50%. Everyone seemed happy. I was getting a Shadow on the front of my rock work so I added a small LED fixture (2CW, 3UV, 4 RB) across the front. I am running that fixture at 50% and turned down my main RB's and CW's to 60% and 30%. I started to notice the body of the button polys and the Matt of the Galaxia turning from a Hot Chocolate color to a pail color. I turned my lights way down (30% on the fronts, 20% on the CW's and 60% on the RB's) and will slowly bump them back up if my corals look better.

In doing some research on clams I was reading that clams with low light can bleach out before they die. Will these corals bleach from too little light?

 

[MHG]

Well with my lights down soo low, my frog spawn is not too happy. I wonder how long I need to wait to increase the light?

 

[Nemo4ev]

I would do about a 10% increase a day.. To note how long have you had the LED's? I have heard that with the increased growth on sps from LED's that you can experience an alk drop which could result in bleaching

 

[MHG]

I have had the led's from day 1... I have had these corals since Black Firday. The new led's I added were probablyto blame. I have had them all down for about a week now. I am not sure how long it will take the color to come back. The alk has been in the steady 9's since day 1