Sprint54:
I've long been interested in injector systems of LC, but if you are injecting that much that regularly then, as Watermom says, you are probably doing something that can be improved. If I were in your position I would take the approach that our mod aylad takes living in Louisiana, where she faced the same problem. But instead of spending $450 on a peristaltic pump system, aylad instead raised her CYA/Stabilizer level to 70-80ppm and then just keeps a higher residual level of Free Chlorine in her pool, always between 5 and 10ppm of FC. That way she's only add chlorine every 2-3 days and uses FAR less over the season.

We've long maintained that it's possible, easy and, under such circumstances even DESIRABLE to maintain a high CYA pool.

I even follow a modified plan here in North Central New Jersey. The first part of the summer I keep CYA at around 30ppm, then for the last half raise it to 50ppm. That way by simply running a higher residual level in late July and August, I don't find my FC dropping.

CYA is not your enemy. It's a tool that, optimally used, can save you much grief and chlorine.

Living in one of the sun states, as you do, I would personally never consider trying to maintain a pool with a CYA of 20. You'll just use too much chlorine, too often, as you have found.

That being said, I would LOVE to have a peristaltic system and, as I said, have looked into it. But I cannot justify the cost.

Carl