Fluval Betta Plus Tap Water Conditioner makes tap water safe for bettas by neutralizing chlorine, chloramine and undesirable metals. Makes Tap Water Safe for Bettas Protects Scales and Fins Contains Herbal Extracts Helps Reduce Stress INSTRUCTIONS: Shake well before using. 5 mL (approx. 1 capful) treats 2 L (0.5 U.S. gal) with every water change.