"Trapper" wrote in message Now I'm worried my
diatom filter isn't up to snuff. I ran it for
about 14 hrs, with input and exhaust in my sump, and the water has
gone from 6" visibility to about 18". I find this disappointing; I
would have thought the diatom filter would be much more efficient than
this. Flow rate is down to, oh, maybe 50-75 gph.

Is this about what people have seen, performance-wise, from their
diatom filters?



Mine has had 90g of green water clear in 2 hours.
If it gets clogged, you need to clean it and replace the diatom powder. I
can determine the amount of clogging by sound and watching, but the first
time use is different I'm sureg. If it starts spitting microbubbles it is
clogging. If the diatom powder has a green tint to it, it is clogging. If
the water is very green I'd imagine it would clog fairly quickly.

In my experience.


--
Toni
http://www.cearbhaill.com/discus.htm