I am thinking ahead with my current tank conditions of .05 Phosphates and 5 Nitrates. I'm too close to bottoming out so I want to raise nutrients. I'd like to do so by automating my skimmer with a 12/12 schedule. The problem is that it's a HOB as I don't have a sump. I'd love a 1/4" 0-10v proportional valve for the air line however I would probably have to engineer it myself. I suppose that I could use a 1/4" solenoid. Has anyone attempted this? To prime the pump, the instructions state to remove the hose from the silencer and place it in the water, but I think plugging it will work just as well. Thoughts?