I've got the Aquatec booster pump and it doesn't change my psi at all. I've got it hooked up after the 3rd canister or 2 carbon block, before my membranes. Is my pressure gauge off? My psi without Is 65psi. When I turn on the pump, it's doesn't move the needle, lots of shaking though. I turn the set screw at the top but I've almost completely unscrewed it and tightened it down with zero results! I'm a goof and mess some things up, so I'm not here to dump on the pump. Probably operator error. Need some help figuring this out. Optimally, it's what I wanted to get the psi to 90psi for the best performance from rodi. I'm lost