ok, here's the rule, imho the simplest way to remember.
first, what is cc/hr? if you are using micro-tubing, you're in luck--cc/hr = drops/min with micro-tubing (tubing with drop factor of 60).
(drop factor is the number of drops from this tubing that = 1 cc.)
if drop factor is 15, divide cc/hr by 4 for drop/min.
if drop factor is 10, divide cc/hr by 6 for drop/min.
:spin: yer home free! :spin: