sumps and refugiums?
Ive had my tank running for 18 mos. and now yearn to learn more on the
reasons and purposes behind the different sump designs. I see alot of
plans and sytems that others have designed, but would like a good source
book describing the different chamber processes and such.
Presently I have a bio-wheel system which overflows into a secondary
chamber where the skimmer and return pump are located.
I'd like to learn the science behind the systems before jumping into
modifying what I have or starting over.
thanks,
Paul S.

P.S. my book library contains:
the Birgit Nielson vol.2 and 3. (hoping for vol 1 for x-mas)
one of Sprungs coral guides and a couple of other starter books.