- Joined
- Apr 19, 2018
- Messages
- 586
- Reaction score
- 503
- Location
- Dumont, colorado
- What state or country do you live in
- Colorado
Getting ready to set up my quarantine tank and treat newcomers with copper, I want to get a Hanna checker to monitor it but I'm confused because they sell a high and a low! Which one do I need?


