Ok, I gotcha' now. I couldn't make the connection. Short answer is it doesn't matter much.

I use a level scoop simply by tapping it on the side of the jar as I take it out. It's one of the few tests where absolute accuracy is not as critical. That said, I try to use the same amount each time for consistency.

Does the Cl level you're shooting for make sense? Post again if it doesn't connect and everyone here will help you get it right.

Most importantly, how does your water look?