Seachem Prime Water Conditioner F/W &S/W

by Seachem
$672.99 (You Save 37%)
Out Of Stock
20 liter

Essential Aquatic Care

Introduce a top-notch water conditioner to your fish's habitat with Seachem Prime, ensuring freshness and safety in both fresh and saltwater environments. Made expertly to neutralize chlorine, ammonia, and other harmful impurities, it aids in providing a healthier home for your marine friends.

Seachem Prime Water Conditioner F/W &S/W Photo 1
Seachem Prime Water Conditioner F/W &S/W Photo 2

Superior Water Cleansing Formula

Upgrade your aquarium's purification process with Seachem Prime, working effectively in both saltwater and freshwater tanks. It is designed to detoxify harmful compounds like chlorine and ammonia, resulting in a nurturing and clean habitat for your aquatic life.

Key Features

  • Removes chlorine, chloramine and toxic ammonia
  • Detoxifies nitrite and nitrate
  • Provides protective slime coat

Seachem Prime Water Conditioner F/W &S/W 20 Liters (5.3 Gallons)

Seachem Prime is the complete and concentrated conditioner for both fresh and saltwater aquariums. Use during startup and water changes to eliminate and detoxify harmful chemicals in tap water and make your aquarium safe for fish.

  • Removes chlorine, chloramine and toxic ammonia
  • Detoxifies nitrite and nitrate
  • Provides protective slime coat

Prime is safe for fresh and saltwater aquariums. It detoxifies ammonia, nitrite and nitrate, allowing the biofilter to more efficiently remove them. Use Sechem Prime to detoxify any heavy metals found in the tap water at typical concentration levels. Prime also promotes the production and regeneration of the natural slime coat. Seachem Prime is non-acidic, will not impact pH and will not overactivate skimmers.

Use at startup and whenever adding or replacing water. Prime may also be used during tank cycling to alleviate ammonia/nitrite toxicity.

Directions: Use 1 capful (5 ml) for each 200 L (50 gallons) of new water. This removes approximately 1 mg/L ammonia, 4 mg/L chloramine, or 5 mg/L chlorine. For smaller doses, please note each cap thread is approx. 1 ml.

Tips: May be added to aquarium directly, but better if added to new water first. If adding directly to aquarium, base dose on aquarium volume. Sulfur odor is normal. For exceptionally high chloramine concentrations, a double dose may be used safely. To detoxify nitrite in an emergency, up to 5 times normal dose may be used. If temperature is > 30 °C (86 °F) and chlorine or ammonia levels are low, use a half dose.


Brand Seachem
Size 20 liter
Weight 54.1 lbs.
Pkg Dimensions 15" (L) x 10.5" (W) x 10" (H)
UPC 000116043106
SKU 431
Product Code PE000909187D77P17034

Customer Reviews

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Reviewed by Ruthie M.

Works Great!

Reviewed by Bill J B.

Works as Expected; easy for beginners like me

Reviewed by Marvin C.

Pond Prime is NOT more concentrated than traditional Prime

Reviewed by Rebecca S.

Check chlorine after using, does not remove it all unless double dosed or more

Reviewed by Craig E.


Reviewed by Bonnie S.

Amazing water treatment that will save your fish from ammonia.

Reviewed by Ray S.

Good product

Reviewed by Carolyn Taylor


Reviewed by alden h.


Reviewed by Lana Morris

Sealed but had a foul smell and had black specks! Replacement on the way

Reviewed by Dane R.

Best one I have tried! Lasts ages.

Reviewed by Ronaele Hinson

The Best There Is To Offer!

Reviewed by Landy M.

Works a treat!!

Reviewed by Katrina Robinson

Economical, Concentrated and works really well

Reviewed by Karolyn G.

Reviewed by Diane C S.

Results you can depend on!

Reviewed by Danielle Mccaulley

Glad I Found This

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