Powerhead for prefiltered reverse-flow undergravel filter

What brands and models of powerheads work in reverse and are easy to
attach a filter to? Thank you in advance for all replies.
--
Whenever I hear or think of the song "Great green gobs of greasy
grimey gopher guts" I imagine my cat saying; "That sounds REALLY,
REALLY good. I'll have some of that!"
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Relevant Pages

  • Re: Filtering replies to filtered posts
    ... blocked posting. ... you'll never see replies in threads containing the offending ... if I wanted to filter replies containing the message id ... and on more headers than those listed on the telnet "overview" ...
    (news.software.readers)
  • Re: Filters
    ... because all other regular replies would automatically have joined ... non-existant articles, ... have to create a filter for each one of them (after tracking down ... My news client doesn't filter on the References header ...
    (news.software.readers)
  • Re: Nobody proposing new uk newsgroups - why ?
    ... However they don't filter the crap they produce, ... different people and those replies generate more replies. ... It's a sad state of affairs when posting the same article to one ... I've considered proposing a uk genealogy ...
    (uk.net.news.config)
  • Re: Puzzle with query expression
    ... Hey John: ... Your query functions sort of like a filter within a filter. ... that it working in reverse. ...
    (microsoft.public.access.formscoding)
  • Re: Upper Filter Attachment
    ... cliff's notes version of my intentions: Write an upper filter ... The fact that the greatest common demoninator here is that all devices ... are USB, and aside from that they may have nothing else in common is ... it doesn't attach it. ...
    (microsoft.public.win32.programmer.kernel)