Seachem SafeSeachem Safe is, in effect, the dry powder version of Prime — the same core water-conditioning chemistry in an ultra-concentrated, powdered form. It removes chlorine and chloramine and detoxifies ammonia, nitrite, and nitrate, making tap water safe for fish, shrimp, plants, and your biological filter. Because it ships as a powder rather than a liquid, it's extraordinarily economical and has an essentially indefinite shelf life.Good to Know: A little goes an almost absurd distance — a single small container of Safe treats an enormous volume of water, which is why pond keepers and high-volume hobbyists love it. The trade-off versus Prime is convenience: you're measuring a tiny amount of powder rather than pouring a capful, so a small scale or measuring spoon helps. If you treat a lot of water or want the most cost-effective conditioner available, Safe is hard to beat.It's the practical choice for anyone running multiple tanks, large systems, or a fish room, where the per-gallon cost of a liquid conditioner adds up quickly.Dosing Guidelines: Use a tiny amount — about 1 measuring scoop (the included 1/4 teaspoon, ~1.25 g) treats roughly 1,250 gallons for dechlorination, so most hobby tanks need only a small pinch dissolved in water. Add to new water at each water change. For ammonia/nitrite control, higher doses may be used. A gram scale or Seachem's spoon scale makes precise small doses easy.