Hmm, 2 drops x 0.5 each equals CC @ 1.0ppm.Crazytown.
This AM results after a water add:
FC- 6.5
CC- .5
TA- 90
pH- 7.5
CYA- 85
CH 175
So, never had a CC reading come back before... but once I added the drops it turned a tiny, tiny shade of pink that required 2 drops to get back to "crystal clear"... so I'll suppose that counts as a .5 of CC?