Re: [APD] Aquatic-Plants Digest, Vol 32, Issue 28

[Derek Parr <derekparr at earthlink_net>]

But couldn't we jury rig our own filter..  ie, a loose net bag of 
charcoal?  Or is it something other than just the filters that require 
that pressure?

-derek parr




Vaughn Hopkins wrote:
> The problem is that the household filters are made for a 40 psi system, 
> so nearly all of that 40 psi is available to drive the water thru the 
> filter.  Not so for aquarium filters.  The little pumps we use develop 
> less than 2 psi pressure at zero flow.  We need filters that give us a 
> back pressure less than one psi.
> 
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