Twenty four thousand fishkeepers can't be wrong. One drop per gallon and my tank is instantly safe for water changes

<p>Instantly removes chlorine, chloramine, and heavy metals from tap water. One drop per gallon treats up to 9,460 gallons per 16oz bottle. Trusted by fishkeepers for years with 24,000+ reviews. Costs about $8.48 — pennies per water change.</p>