Yoyoyo, guys. I know a lot of us have 10 gallon or less for our tanks, which can make dosing medicines pretty tough. Those annoying meds that are "1 tsp for every 10 gallons" really blows when you have a 2 gallon!
I had this issue with my liquid medicines, since its so hard to get a mL or whatever (hah!) and went to Walmart to buy a syringe. Best. Buy. Ever.
Theyre usually really cheap, like $3, and the one I have came with tips to help extract meds from the container, as well as a tsp and less dry measure, which is great for salt.
Here's some from Wallyworld's site, check em out! Theyre sold by the pharmacy aisles, usually by the aspirin/ear plugs/etc (weird stuff) ;)
I got something like this, for about $2 :)
Next time you're at a store like this, pick one up, its great to have!