- Joined
- Dec 11, 2015
- Messages
- 96
- Reaction score
- 51
my eyes aren’t as good as they used to be, and I find it hard to detect the varying shades of blue easily. I prefer to compare my water to the sample included in the kit. Unfortunately, they don’t give very much of the sample with the kit. Could I set some of my water aside in a sealed container to use as a reference for future testing, or does the copper dissipate in water over time?