Where to start??

[DoubleEcho]

Holy cow, you're on well water and you comfortable draining and refilling your pool? Is your well an underground lake?

I just say that because I have a shallow well and the best I can do is top it off a few inches if needed, especially in the summer.

 

[mknauss]

Do I need to worry about the ph and TA during this phase?

No. Maintain the SLAM level FC until you meet the three criteria for a successful SLAM