wrote in message
. com...
be sure the return pipe is a large diameter and frankly, it works better
to plumb a
biofilter in reverse, the input at the bottom, the output at the top just
because
"crud" can settle on the bottom easier. OTOH, it IS easier to lift the
coarse filter
off the top to clean it, but if you have an valve at the bottom that can
be opened
then the whole thing is easy to clean out.
you not only need holes to make sure it doesnt clog, the more holes the
less suction
at any one of them. Ingrid
================================
I would think this would put some serious back-pressure on the pump as the
filter material caught the crud and slowed the flow of water.
--

RM....
Frugal ponding since 1995.
rec.ponder since late 1996.
Zone 6. Middle TN USA
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