Quote Originally Posted by docwagner View Post
Now need to find plain old bleach. I think the pool is 35,000 gallons, but will double check. My local pool store has a fee water testing service. I know they just will want to sell me chemicals, but if you think I need my own test kit I will get one. I read on your other site something about calcium not being necessary with vinyl lined pools. Did I read that right??
=> Walmart store brand 8% sodium hypochlorite bleach is fine, and available almost everywhere. Plus, it's fresh.

=> There are a few pool stores with accurate testing, but very few. They have no incentive: bad testing leads to increased chemical sales!

=> Test strips = inaccurate testing, always. The stabilizer (cyanuric acid) test is especially bad.

=> Calcium can be too high, in a vinyl pool, but normally not too low.