Review on Industrial Test Systems 480026 WaterWorks by Edwin White

We pay for certified testing of our industrial effluent to confirm high accuracy. Not too expensive but takes 3-7 days to see results. Since hexavalent chromium can sometimes contaminate our systems, this is a great test for our on-site water treatment. For the price it's fantastic! Expect to pay over $100 for a more accurate and harder to use set of 5-25 tests. Edit: Looks like the seller moved this review from hex chrome test strips to zinc test strips. Since we also use these test strips to determine the zinc content, I think that's a good thing. Just hope they keep their prices down or we'll start using fewer strips.