I'm planning some automation for my solar panels, with electrovalves to divert the flux to an heat exchanger to heat the pool as well.
I will need to add a new pump to the system, the one I currently have is a grundfos UPM3 25-75 180 60 W, and I'll need a similar one, to control with the PWM pins. and my arduino will need to control two of them, regulating the speed according to the feedback of a thermometer.
I'm not sure how to get the electronics to control it. can someone help me out to the electronics or to a resource where I could learn about it?