Seachem Prime — Concentrated Water Conditioner

Seachem Prime is the most concentrated, complete water conditioner available for freshwater and saltwater aquariums — up to 5× more concentrated than competing products. One capful (5 mL) treats 50 gallons, making it the most cost-effective option for routine water changes. It removes chlorine and chloramine, detoxifies ammonia, nitrite, and nitrate, and is safe for use during tank cycling.

Key Features

• Removes chlorine and chloramine instantly
• Detoxifies ammonia, nitrite, and nitrate — safe for use during cycling
• Detoxifies heavy metals commonly found in tap water
• Non-acidic formula — will not impact pH
• Will not over-activate protein skimmers
• Does not harm beneficial nitrifying bacteria
• Up to 5× more concentrated than competing products
• Safe to double-dose for high chloramine; up to 5× dose for nitrite emergencies

Dosing

• 5 mL (1 capful) per 200 L (50 US gallons) of new water
• Can be added directly to tank or to new water before adding

Available Sizes

• 100 mL | 250 mL | 500 mL | 1 L