Thanks guys!
I have a dispensing syringe that I use for filling up fountain pen ink cartridges that is 30mL. I heard that HC110 is syrupy, so will it pour of of those kid medicine spoons completely? (i.e. is it thick enough that I won't get all of it into the water?)

Also, I noticed that Kodak's fixer powder package makes a full gallon. So I dump the contents into a bottle, fill it to the brim and shake it up? Or should I do that in another container to ensure more even mixing?