i am wondering if it would hurt my controller to have 2 pumps controlled by the same controller.i want to have one pump top-off water and the other to drip kalk very slowly simultaneously ..would it burn up the controller to plug 2 pumps into it????
It would depend on the controller. If it is rated for enough amp draw then you should be fine. I would assume you are using small pumps so I bet you would be OK but would check the amp capacity on the controller.