Quote Originally Posted by rz1a View Post
one last thing, my refugium is a very small section in the 20 high because most of it is being used by my skimmer, is it okay if the light covers the whole length of the sump?
That should be fine, as long as it doesn't get too hot. I have a sticky thermometer on my sump as well as my display. There is sometimes a variance, but not often. If you have some swim trunks with that annoying mesh inside, you can cut some of that and rubberband it around the intake. It works like a charm for me.