New to the water stuff - need to expand from just the hardscape side. Existing customer wants a pond - it'll be about 11x14 w/ max 3' depth in center to winter over plants - ave will be about 2'. From the waterfull it'll be 22', twin streamed (about 3' wide and 6" deep) with small center island per se, so call it 44' total stream To calculate : I'm looking at 4.5' friction head on stream - correct? plus 3' static lift - 3' height of falls -correct. So it's 8' then rounding up? Want some decent gusto at the weir - not rushing but nice flow. Thinking a EasyPro 3900 or Tsurumi 50PN2.255 (little small?) might do the job or what do you think? I'm using these 2 brands since I know others like them. I'd consider maybe AS but real spendy and some have swore them off around here for various reasons. Thanks for input. Marko **used 11x14x2x7.7=2310 gal plus some obviously in stream. Don't know how to calculate a stream volume.