[What to do with water?]

Optimal filter water and then mix it with other chemicals? For example, using such filters https://wisepick.org/best-whole-house-water-filter/, of course, I will need much more in size. Will, it cost more resources or not? My goal is to reduce the consumption of additives.

[summer swimspa care]

Good idea, try it

[Overdose of citric acid]

It will take time, but it should disappear from your pool, then you can change the mixture.

[Slamming your pool]

You can call your local swimming pools and clarify what kind of containment they have, so you can find out the information that is already being used in practice