So I ran the test today. Isolated my left diffuser head which is most shallow. Ran around 5.5 psi on the bottom. Pulled it up out of water and there was little change. Took diffuser head off and dropped hose to bottom and got around 1.5 psi on the gauge. So in short, between the check valve and soaker hose I’m getting around 4 psi head pressure. I brushed it when I pulled it up to clean sediment and algae and got little change. Guess I’ll be getting a couple matalas or something of the sort. 😞