I need some help setting up the suction and return on my spa. I have the automated valves and in the past, I bumped the switch on the spa suction to about 1/8-1/4 open and moved the switch to center/off. I then did the same on return to match the suction or add more to overcome the suction. Then moved the switch to center/off. Why did I do this? I found that with the suction closed and the return overfilling the spa and over the spill way that the bottom of the spa collected stuff and since there was no suction the bottom became dirty. Am I doing this wrong?
I had a pool guy over today and asked if he could set the cam on the shaft to where the switch would be in the on position but the valve would be somewhat open to allow a transfer of water through suction. He said the shaft cam would not work that close and the first position would allow too much suction and drain the spa.
What's the proper way to do this setup?