Any good electronic water tester?

[fly4koi]

Wondering if there's any good electronic tester that I can buy? My goal is to measure the nitrate level mainly so to determine my water change needs, but if there are comprehensive (and affordable) testers I'm also open to it, thanks.

[richtoybox]

I used the Sensafe Exact Micro 7+, buying test strips for everything that I wanted to test, including potassium permanganate. Easy to use, digital, and no color interpretation needed. I think the PP test used the oxone test, with some form of interpretation table which may or may not still be available.

[fly4koi]

Thanks, Rich. So no magical bullet I suppose, the tests are consumable.

[richtoybox]

That one was the best that I could afford, and yes, you have to buy new test strips to stain the water for each test.