- Joined
- Aug 23, 2019
- Messages
- 5
- Reaction score
- 23
- What state or country do you live in
- Washington
We are having a household debate on how to read this Red Sea nitrate test. I say hold the bottle above the card and look for a match. My hubby thinks set the bottle down on the card. His readings are much higher than mine. Thoughts? Thanks in advance

