On 18 Apr 2005 08:44:52 -0700, robv60 wrote:

I do have a reservoir at the top of the stream/falls. Not very deep
though, only about 8 inches deep. Im also concernd about water pressure
loss to my stream/falls using too big of a filter, hence the want to
filter through rocks in the streambed.

If finances aren't a problem you could go for a self cleaning
bubblebead filter as at http://www.bubblebeadfilter.co.uk. Some of them
clean themselves by putting the pump on a timer and shutting it off for
a few minutes every so often.

--
Regards - Rodney Pont
The from address exists but is mostly dumped,
please send any emails to the address below
e-mail ngpsm4 (at) infohitsystems (dot) ltd (dot) uk