On Thu, 04 Aug 2005 07:51:43 -0700, Courageous
wrote:


Wouldn't these small critters like tiny chorus frogs, pollywogs and newts
get sucked into that bottom drain?

Possibly. It's a large pipe. It's 3600 GPH through a 4". If it's too much,
they'll end up living in the settling tank. :-)

C//
Hi Courageous,
I've been trying to think how to construct a rather large screen dome
to place over the BD to address this problem. ("Large" = reduced
suction per sq.in. = small critters (and fish) can escape more
easily); but screen grid still large enough to permit mulm to pass
thru.

Or perhaps concentric domes of decreasing grid sizes(?)

It's a difficult question isn't it? -- trying to solve two intertwined
but mutually exclusive problems at the same time!

Do you think it's worth experimenting?