Hey everyone! Thanks to this great site we are thinking of changing from a single speed pump to a variable speed. The one question we have is that when our current pump is on, we have a spill over from the spa to the pool (3 waterfalls). If we install a variable speed pump, will the water fall still work during the time that the pump is on a low setting or will it just “dribble” down the spa wall into the pool? It’s not aesthetics that we are worried about but we get a lot of calcium build up on that area due to our hard water and don’t want it to dribble over and cause even more calcium build up on our new glass tiles. Currently we have build up only on the sides of where the waterfalls flows over into the pool. Thanks for the help!!