I've had really bad experiences using alcohol as a solvent for prazi - even worse than the glycol solvent in prazipro, the alcohol can fuel a bacterial bloom that can strip oxygen from the water. You need to use the absolute least amount possible and then aerate the heck out of the tank.About 400mg/L I think. Those pills above have 100mg. Maybe could speed this up prior using a slight amount of heat. I.e. crushing put in a beaker, and a hotplate. Possible in stainless steel and on stove top likely. Doing it this way I would use 2 pans like a chocolate boiler. Then let cool. Maybe use fairly pure vodka to dissolve. I figure with this brand its 18.93 mg/gallon. 1 pill for 5.28 gallons.