How much led light?

[millersteve383]

Hello all,
I just purchased a reef breeder 120w led light for my 28g nano. I have some Zoas and frogspawn and a few other LPS corals. I bought the light from pure reef and am having a little trouble finding info on how much light to run. There are two channels one of which is blue and the other is red and white color spectrum. The brightness goes from 0 to 100. I am trying to figure out how much light and how long to run this. I had 100 W compact florescence that I was running before and I have actually been getting some Brown algae growth from running these lights for six hours. Any advice would be greatly appreciated thanks!

 

[Kbannisterf5]

I would start out with about 20% white and maybe 40%-50% blues and go up over the course of two months to a max of 50% whites. Just watch your corals and see how they responde to the slight increase each week.