Mat wrote:

I take it a trickle filter is one that goes down a slope to the
bottom and pumped to the top again?

You may need to adjust the bottom pipe it sounds like its to far out
the water. so just raise the water level of lower the pipe.

Mat "Jon Pike" wrote in message
. 159...

I've recently 'upgraded' my tank to include a trickle filter
design. Basically, two pvc tubes take water in from just below the
water level and carry it down to the sump below. It's then pumped
back up to the other

side

of the tank. My question is, how do I make the input less noisy? I
put

fine

netting over top, and that reduced the sound somewhat, but now
there's a higher pitched occasional sucking sound. Any suggestions?
TIA - Make sure no air gets pumped in. Air in the pump is often
responsible for such noises.
Tin-Tin

http://www.neopets.com/refer.phtml?username=moosespet