Any problems with new dKH checked?

[Vigo_the_mack]

Hi all, I just got a new hanna dKH checker. I tested my new, lightly stocked reef and was surprised to get a reading of 6.2. This seemed extremely low to me so I tested it at least 7 times and got either 6.2 or 6.4. I then tested my new saltwater I made for a water change made with reef crystals and somehow got 5.8... somehow lower than my reef, so I tested that numerous times and keep getting the same result. Could I have gotten a bad tester?

 

[AZMSGT]

Not likley a bad tester. Most likely low Alk on your salt mix. Best thing to do is take a sample of water to your LFS and have them test it and compare.

 

[X-37B]

I use salifert and elos to cross check my hanna just to be safe.
Get the calibration standard for your hanna too.

 

[Vigo_the_mack]

You were right, bad salt mix somehow. Brought sample to the fish store and they got the same reading as me. Thanks for the help