I wondered about the same thing!
I'm building my first 'fuge and have seen more sumps with just a chamber for skimmer, 'fuge area and return chamber instead of a bio tower. Is the bio chamber a thing of the past, or are 'fuges doing double or triple duty? I'm just trying to decide on using space in my 40 gal sump for a bio chamber or for more space for my live sand and live rock.
Please let me know how ya'll feel about it.
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