Seachem Prime Water Conditioner F/W &S/W

by Seachem

Selected Option: 250 ml (8.5 oz)
$17.99 (You Save 44%)
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Selected Option: 250 ml (8.5 oz)

Key Features

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


Seachem Prime Water Conditioner F/W &S/W 250 ml (8.5 oz)

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.

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
UPC 000116043601
SKU 436
Item Number L170389097P17038
Size 250 ml (8.5 oz)
Weight 0.7 lbs.
Pkg Dimensions 12.25" (L) x 3.25" (W) x 1" (H)

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Reviewed by Ruthie M. on Aug 13, 2021

Works Great!

Reviewed by Bill J B. on Apr 17, 2021

Works as Expected; easy for beginners like me

Reviewed by Marvin C. on Apr 10, 2021

Pond Prime is NOT more concentrated than traditional Prime

Reviewed by Rebecca S. on Apr 1, 2021

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

Reviewed by Craig E. on Mar 8, 2021


Reviewed by Bonnie S. on Jan 23, 2021

Amazing water treatment that will save your fish from ammonia.

Reviewed by Ray S. on Jan 14, 2021

Good product

Reviewed by Carolyn Taylor on Jan 2, 2021


Reviewed by alden h. on Dec 26, 2020


Reviewed by Lana Morris on Nov 18, 2020

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

Reviewed by Dane R. on Nov 4, 2020

Best one I have tried! Lasts ages.

Reviewed by Ronaele Hinson on Nov 3, 2020

The Best There Is To Offer!

Reviewed by Landy M. on Oct 15, 2020

Works a treat!!

Reviewed by Katrina Robinson on Oct 2, 2020

Economical, Concentrated and works really well

Reviewed by Karolyn G. on Sep 9, 2020

Reviewed by Diane C S. on Aug 26, 2020

Results you can depend on!

Reviewed by Danielle Mccaulley on Jul 24, 2020

Glad I Found This

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