PH and water density/flow?

[banditpowdercoat]

No pics, but pretty basic sump setup. 1" Herbie flows into sump, through some baffles, and Little Giant 4 pumps back to tank. Only other thing running off the LG is a Phos reactor, at a reallly low flow. I just got a Kill-A Watt. Checking the voltage at the pump from lights on/lights out. Should not have a drop, but you never know.