- Joined
- Aug 31, 2014
- Messages
- 31
- Reaction score
- 8
Because of reviews I have purchased the Hanna alkalinity tester. My first test indicated that my alk was at 6.7 dkh. I found that to be off because I have always used Red Sea Alk and when tested with Red Sea it shows 7.8 dkh. Can the difference be that big between the two. If so how can I know which is correct?