Will look it up thanks. The filter is 4 foot tall so it might not be that
bad it is large enough to handle the full 3800GPH plus if I was pumping with
no head at all.

"RichToyBox" wrote in message
news:HoFTa.116262$GL4.30407@rwcrnsc53...
It is my understanding that you would need to have a filter that will
filter
down to about 5 micron. This fine a filter will clog very quickly in most
ponds. Did a Google with micron, and algae for rec.ponds and found
several
posts on the subject.
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.html


"Mickey" wrote in message
...
I work for a company that uses industrial filtering systems for water
and
found a filter to use for a prefilter that I think will work great. The
question is what micron rating is good for a pond? I would like to
filter
out some of the green crud that keeps me from seeing deeper than 5
inches.
I
am hoping this will work. I thought about getting a 20 micron or smaller
and
seeing how long it takes it to clog up. If it would last a week that
would
be great.