I may get something like this also with the Hanna just to do double tests.I use these. When you understand that we’re not looking for total precision and just a quick, close enough check, they work wonderfully IMO
Aquavital Marine Test 5-in-1
Vital water parameters, at a glance! The Aquavital Marine Test 5-in-1 offers 1 minute test results on five of the most important parameters in your aquarium. Sometimes you don’t have 10 minutes to sit around and open bottles of reagents and go drop by drop, test by test. Even experienced...www.bulkreefsupply.com
-edit- oof the reviews look REALLY bad for this one