the measurement would be in mL's
using a medicine dropper at the moment for measurement, i know it's not the the greatest in accuracy but it's the best i could find for the time being.
Ditto on the Bacopa ID....
A medicine dropper is accurate enough. After all you never really
know how much of the ferts your plants take in. I use dropper bottles too. And I can easily adjust how much I add. Sometime I add a little more sometimes less. Tweaking in this hobby is omnipresent!