Thanks Bigdave and pooldoc. Hope I diodn't come off sounding jerky. I'm a big time do-it-yourselfer (read cheap skate). Way back when I was 17 yrs old (38 yrs ago) I paid $150 to bet the front oil seal on my Opel Kadet Ralley replaced - and it still leaked. I figured out how to do it myself.....part cost $5. Since then I would rather screw it up and learn something than pay someone else....(cheap & stubborn).

Pooldoc - I'll check on poolspaforum.com. Thanks for the tip. And I have never trusted any pool shop about my chemicals. I watched my father-in-law do whatever the pool shop told him concerning pool chemicals. He would spend $100 per month minimum and that was 30 years ago. (cheap, stubborn, and skeptical)