JBL ProAquaTest Cu Copper & Refill

Finally, a test that actually gives me enough reagent to test multiple times before needing a refill. The color chart is straightforward enough that even I can match the copper levels without squinting. My shrimp stopped dying off after I confirmed the water was safe.

I've been chasing a mystery copper spike in my planted tank for weeks, and this kit finally gave me a clear, easy-to-read result in under five minutes. The refill option is a smart touch since I'll be testing regularly now that I know there's an issue to manage.

Finally a test that reliably catches copper before it harms my shrimp. The refill pack is really convenient, I won't have to buy a whole new kit next time.