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U/G Filters and Sand

In a message dated 12/7/98 1:01:39 AM Pacific Standard Time, Aquatic-Plants-
Owner at actwin_com writes:

<< Subject: UnderGravel Filters and Sand
 How can I use a Undergravel filter and "Desert Sand" together without it
 clogging up the powerheads and the plate tray itself. Is there some way to
 overcome this problem of any sort???
You might consider a "reverse-flow" powerhead arrangement with foam filters
(provided by the manufacturers) on intake sides of the pumps and discharging
the water into the U/G risers...
Bob Fenner