I am filling the test tube to the top and still can see the black dot...what would that mean my number would be?? Here are the rest of my numbers...Any help about the CYA would be great ....thanks
FC 3
PH 8
TA 120
CA 250
CYA 9+ ??
FC 3
PH 8
TA 120
CA 250
CYA 9+ ??