Seachem Prime Complete & Concentrated Water Conditioner

The one bottle every aquarium needs. Seachem Prime is a complete, highly concentrated conditioner that makes tap water safe for fish the moment you add it. It removes chlorine and chloramine and detoxifies ammonia, nitrite, and nitrate, so fresh water and mini-cycles will not harm your fish. It also binds heavy metals such as copper and lead. One capful treats a lot of water, which is why a small bottle lasts so long.

Safe for freshwater, saltwater, and reef aquariums. Stock up alongside the rest of our water care and aquarium essentials.

Why hobbyists reach for Prime

• Removes chlorine and chloramine from tap water instantly
• Detoxifies ammonia, nitrite, and nitrate during cycling and spikes
• Binds heavy metals such as copper, lead, and iron
• Extremely concentrated, so a little goes a long way
• Will not overactivate protein skimmers or affect pH
• Safe for freshwater, saltwater, and reef systems

How to use

Use a standard dose of 1 capful (5 mL) for every 200 liters (50 US gallons) of new water. When setting up a tank or doing a water change, add Prime directly to the aquarium or to the replacement water. During an ammonia or nitrite emergency you may safely dose up to 5 times the normal amount. Shake well before use.

Specifications

FAQ

How much water does one bottle treat? At the standard dose, 5 mL treats 50 gallons, so even the small 100 mL bottle treats about 1,000 gallons of new water.

Can I overdose it? Prime is very forgiving. You can safely use up to five times the normal dose during an ammonia or nitrite emergency.

Is it reef safe? Yes. Prime is safe for freshwater, saltwater, and reef aquariums.

Why does it smell like sulfur? That odor is normal and harmless for Prime, and does not affect how it works.