(DavesVideo) wrote in message ...
Say a pump is advertised as able to deliver 1000 gal/hour at say a height of
6". I would guess that it means 6" above the surface of the water rather than
the bottom where the pump sits. Is this true? Doesn't seem to make sense any
other way.


Dave
http://members.tripod.com/~VideoDave

It is not a good idea to set the pump "right" on the bottom because in
case the hose comes loose on the filter the pond will empty
completely killing the fish. Also, setting it on the bottom will be
clogging it with debrie and mulm. The pump size should be at least
twice the final calculation. Good luck.