What type of tests are you using? Drops or strips?

With a CYA of 0, you need to get your FC level up to 10 and keep it there...testing 2-3 times per day (morning / noon / evening) and adding chlorine as needed to keep the level up to 10. Keep your pump running 24/7, backwashing/cleaning filter as needed...probably daily, if not more often than that.

The aeration should help lower your TA, which you DO need to bring down...WAY down...somewhere from 90 -120 is ideal. Your pH is OK for now. It's at the low end of normal...just keep an eye on it.

Calcium Hardness looks good.