Well, it's actually sold in a solution as a cleaner. Mine is 10%. By 'pure' I mean "no additives". XD For me, it was the least stressful way to cycle, because I could control when and how much ammonia was in the tank for cycling. But you use so little that I wouldn't suggest buying it just for the move. :) So just toss in a pellet or something, and hope for the best.