desert fishy
New Member
I'm starting a 75 reef with 30 gal ref, but only have 5" of space in the sump for a skimmer. After research, I've found 4 that will fit other than hang on or external. They are ETSS, Tunze, Deltec and ProClear. Can any of you please advise on which is best or if an external is better. Thanks for the help.