Changed my water filter

One meter says 0, and the other is super slow. The other one said 002, you shouldn’t have to change it till it says 006. I shook it, and it changed to 038. So I have no idea what the TDS of my water is. I’d need new working tester.

Damn, now I’m going to need to buy another filter. I like having one on hand, so I can change it without going somewhere.