Refugium Question

[tomclx]

HI All,
I have a quick question. I recently set up my 20 gallon refugium for my 90 gallon tank. The tank has been up and running for about 2 months and everything good. However, i have noticed that brown algae has completely covered my substarte in my fuge.
Im my fuge i have some live rock, and some Cheato. Cheato seems to be thriving, but algae is out of control. I am running my lights on a reverse cycle. I am using coral life 18 watt 6700K. Is this normal for the fuge to get covered in this much brown algae?
Thanks

 

[beatlesfan]

i use a wet/dry so i don't know but i don't think it's a bad thing.

 

[wax32]

It's normal in a new tank. That light probably won't be enough for the chaeto though.