You know what? I'm about sick of that PoolCalculator! (Not your fault! Not blaming you!) It's a useful tool, but it's NOT useful for the inexperienced. I saw it happen last year, and I'm seeing it happen more, this year: people using it end up chasing numbers FAR too often. It's my fault; I haven't make something better.

But do this: download the "Bleach Calculator", created some years ago by a member here -- http://www.poolforum.com/zxq/BleachCalc262.exe -- and use it. It's much simpler. There is some sort of issue with the borates calculation, so when you need that, check with me, first.

Anyhow, both your TA and CH are *fine* for YOUR pool. They are too low for a *concrete* pool, but that is NOT what you have.