Sulfuric Acid; Check My Math Please...

[Jposch]

Your sw-in lines may be clogged, or the check valve. Looks like mine runs a little over 100. Unit it places in direct light, so the lines get red and brown slime in them, and I have to give them a roto-rooter like every 4 months or so. Check valves gets real clogged. Probably should jist replace that. But I clean those out too. Lol