Hi recently purchased home My question after reading a lot on blower motors for spas and having a venturi setup I think a blower motor may not give me the rapids effect the kids are looking for I am not to sure about my setup I have enclosed some pictures any suggestions greatly appreciatedhttp://s865.photobucket.com/albums/ab213/johnnysouth1/
thank you Johnnysouth

A blower increases the amount of air coming out of the jets, which generally increases the drama/boiling/effect. There will still be a fair amount of air coming out of the jets even without a blower.