i have a 50g refugium that is just housing chatoe and some LR. its getting pretty low flow around 300gph. i am getting surface film pretty bad, and i think a powerhead would get all clogged with chatoe. is there something else i could do?
Where's the drain on the refugium? It should be able to take care of the film if its at the waterline. Otherwise you could diy an internal overflow box to help with it. You could also make a spray bar for the water that enters the refugium to break up the scum.
i have my fug set up as a remote fug and dsb. it is a few inches higher than sump, a small ph pumps water into it up to bulkhead level and all the top water is drained off back into sump, will try to get a picture