When slamming (which I've had to do twice this season - once to open, and once just this week when CC went > 1PPM), I use LOTS of R-0871, since at [e.g.] 25PPM FC, I need 50 drops of R-0871, potentially 3 or 4 times per day (morning test, 2 tests thru the day, and 1 evening test for my OCLT)...