So I had a chaeto compartment in back chamber that died off. Think my phosphate is too low. I have the innovative marine red fuge light attached to back of IM 40 tank. So now just hanging the cross stitch with a bubler under it in back chamber? Do you leave bubbler on 24/7? I have lights on for 12. Does this setup sound ok?
Yup, all sounds correct. Flow 24/7, lighting period depends on the lights and the system, but 12 is a good start.