Thanks, I like the noise that my waterfall produces and decreasing the flow
rate would diminish the sound.
So thanks for your replies, I will use the other solution of a smaller
existing pump to create the circulation I need.

"AAALarry" wrote in message
news:WyYbd.397455$Fg5.100918@attbi_s53...
will putting a hose on the intake of my pump decrease the flow rate?