I'm thinking of upgrading my sump/skimmer to a custom sump/refugium with a much better skimmer. i was thinking of getting the AquaC EV-240 with a mag 18. it's a bit expensive and if i can buy something just as good as that for less i will. but if the aquac ev-240 is far superior to everything else out there then i don't mind spending the extra bucks.