Can closed canister filters like some Ocean Clear
and eheim models really act as excellent biological filters similar to a
wet/dry system given the apparent need for open oxygen/water interchange
that
wet drys have and canisters do not?
WAYNE MAH
LAW LIBRARY
OSGOODE HALL LAW SCHOOL,
YORK UNIVERSITY, 4700 KEELE ST.
TORONTO ONTARIO. M3J 1P3
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