Test Kits
What do you want?
Strips
- Cheap
- Fast
- Horribly inaccurate
https://www.amazon.com/dp/B09MSY8BLB/
The target audience for these is a weird overlap of pool owners who actually care about balancing their pool but don't mind doing it poorly.
Kits
- Expensive
- Slow
- Accurate enough
https://www.amazon.com/dp/B084SWBBVF/
^^ this is what I use, it's great.