thinking about it now, i guess that even if it is a FOWLR
or a reef, it would only remove what a pwc
would remove anyway.
i suppose if you ran about 15% of your tank water through the RO
in your sump, and it worked (lol) it may eliminate the need for a pwc
... it would help to remove your excess DOC
's and if your trace elements are lower (as they would be with a pwc
) then you would supplement as usual.
i really want to find a fault with this! lol any ideas?