Hello again, I had posted back in December, 2020 that my husband had passed in July and I was taking over the pool maintenance. It had high CYA and I was advised to drain and start over. The task seemed a bit daunting and I put off the draining. But thanks to the snow, ice and sub freezing temperatures we got here in Texas last week, it drained itself!!! My power went out in the middle of the night which made my pool & equipment freeze. When things finally began to thaw I found that the pump strainer basket cover had cracked & was draining the pool. I have already replaced the cover. I guess I won't know if there is any other damage until I get the pool filled back up and restarted again. My pool is 16,000 gallons, and I would estimate it is down to about two thirds empty. Is this enough water out to begin filling again and to remedy the high CYA? Or do I need to find a pump and drain it completely? Last test I had done was on January 15, 2021 and the CYA was off the charts high. Thanks for the help! Lisa