13 Fluidized bed filters
Description
This article is from the Aquaria: Filters FAQ, by Bruce Hallman.
13 Fluidized bed filters
Very recently, some hobbyists have reported success with a new type of
filter which uses a fluidized bed of sand. This filter is roughly
similar in principle to the reverse flow undergravel filter, but with
much higher water flow. The higher water flow keeps the sand clean of
debris, while at the same time allowing the development of large and
efficient colonies of beneficial bacteria. Reported problems include
oxygen depletion and clogging.
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