i currently have a 200 gal with a wet dry and cheap retun pump that died, also a eheim 2026 filter with a coralife uv 6x. Im debating if i should run the uv coming off the wetdrty pump ( i just got a mag 12) or keep it on the eheim? My sump has an external out on it, should i use the mag external or internal? how loud are they external? tia.
