Ref-eeeew-gium

My refugium is looking really gross lately. In addition to the Chaeto algae there are all sorts of other algae growing. Algae is growing out of the PVC pipe as well as all over the glass. There is also green pond scum growing on the top. Certainly not something I would want to have in my main tank but in the refugium it's fine. As long as the algae is working hard consuming nitrates they are welcome to stay.