Anyone out there use the Piperazine de-wormer? I'm trying to igure out the dose to add to 1-gallon of water, my bottle says: Active ingedient per each teaspoon (5mL)...........250mg piperazine base as Piperazine Citrate. Looking to beak it down, says: 1tsp. per 10lbs of body weight. Anyone has any sugestions???