- Joined
- Jan 27, 2017
- Messages
- 112
- Reaction score
- 93
having used the Hanna Calcium checker exactly as the instructions including using the cleaning cloth and wiping the corvette with the Hanna solution it gave me a reading of 530 I then did a second test and got the almost same result, I have not dosed any calcium from the last water change 1 week previous and the test reading then was 430, I have many SPS coral in my system so I would have thought the test would be lower having not dosed any calcium, for a back up test I used a Salifert calcium kit and after two tests I got a reading of below 300, has anyone else experienced this with the Hanna ??7