0.2 ml is about 4 drops. Although by your routine you dilute 1 by 10,000 as chem geek suggested, you compromise on the accuracy significantly by dropping in only 4 drops.
I wouldn't measure anything less than 1 ml - that's about 20 drops. You can do two dilutions of 1 ml into 34 fl oz and you get your 1 in 10,000 dilution.