for dosing my 10 gallon I have 1 of those little plastic syringes (with no needle) that holds 1 tsp (which is 5 ml) so you can acurately measure down to like 1/5 of a mL using a syringe. Which is 1/25 of a tsp. If you don't already have a syringe, make your way to the pharmacy section at your grocery store and if you don't see a syringe or don't know what one looks like, ask someone at the counter. For small tanks, syringes are about the handiest thing on earth!
You will be very glad you bought 1 and they are cheap!
My syringe is labeled: exacta-med dispenser
You will be very glad you bought 1 and they are cheap!
My syringe is labeled: exacta-med dispenser