I've found water test kits like this:

http://www.ionizers.org/water-test-kits.html

But it doesn't seem reusable or practical. The reason I've brought my question here on AWRM is because so many members here have experience with a lot of different products. Over the years I've gotten a LOT of great tips on gear and tactics from the militiamen on here, and I'd be a fool to ignore the wealth of knowledge here on this forum.

On equipment: You get what you inspect, not what you expect.
On training: Our drills are bloodless battles so that our battles are bloody drills.
On tactics: Cheating just means you're serious about winning.