Hi Grant, sorry it took me so long to respond....just got back from a short trip. No, I will not have a vortex/settlement chamber before my 300's. I think that the mechanical aspect of the 300's should be good enough to filter out the big particles before the water hits the biological chambers. Also, I will be dumping the mechanical chambers on a daily basis so hopefully this will be enough.
Do you or others use a vortex/settlement chamber before your guys' Nexus? Is it necessary to use a vortex/settlement chamber before the Nexus?