Refugium questions
 

Could I put a refugium into the final chamber (return chamber) of my sump? The return pump would be in there with the macroalgea, would this cause problems? Or would it be a better idea to make a hang on style one and place it over the return chamber? It would be easier for me (and by me I mean my wallet) to avoid the hang on style one.

Also is a 6500K bulb sufficient enough for this setup and how many hours of the day do you leave your light on in your refugium?

Thanks!

6500k would be sufficent, and the reverse cycle of your display lighting (so night time I would assume for your refugium) seems to work well

problem with same chamber as pump is could clog your intake so often see sump divided in 3 sections (skimmer/fuge/return). I've got a seperate dedicated fuge now but starting growing chaeto just between my sump baffles (they were though about 4" apart).

for light I'm just using a 6500K spiral CF lit 24/7

Good point.

I think it's time for me to try a bit of DIY and see if I can make a bigger 4 chamber sump.