I just measured out the powder and dumped it into my tank. However, since the packets came in 1 gram packs and I had no digital scale, I just divided the powder in half a few times and eyeballed the dosage. I might have overdosed the tank but the hydra were all gone and my pond snails did fine. There will be some undissolved pieces but they will eventually go away.
RAOK Club #77|The Fraternity of Dirt #112