- Joined
- Aug 10, 2020
- Messages
- 59
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- Location
- Illinois
- What state or country do you live in
- Illinois
I just got the red sea algae control pro test kit. I was just wondering, how do I know when to test high range? I dont really understand the high range thing. I tested both and I think I got the same color. So is it .08 or 1.36? How do I know which one it is? Any help would be great, thanks.

