Prime - Complete Concentrated Water Conditioner

Grouped product items
100 mL Prime - Complete Concentrated Water Conditioner

SKU: 232239

In stock

$4.52 $4.52

- +
250 mL Prime - Complete Concentrated Water Conditioner

SKU: 232240

In stock

$9.84 $9.84

- +
500 mL Prime - Complete Concentrated Water Conditioner

SKU: 232241

In stock

$18.69 $18.69

- +

Prime is the complete and concentrated conditioner for both fresh and saltwater. Prime removes chlorine and chloramine as well as detoxifying ammonia, nitrite, and nitrate. It is non-acidic and will not impact pH. A further bonus for the reef hobbyist—Prime will not over-activate skimmers. No other dechlorinator can compare in quality, concentration, or effectiveness to Prime.



  • Complete and concentrated conditioner for both fresh and saltwater
  • Removes chlorine, chloramine
  • Detoxifies ammonia, nitrite, and nitrate
  • 5X more concentrated than competing products


Prime may be used during tank cycling to alleviate ammonia/nitrite toxicity. It contains a binder which renders ammonia, nitrite, and nitrate non-toxic, allowing the biofilter to more efficiently remove them. It will also detoxify any heavy metals found in tap water at typical concentration levels. Use at start-up and whenever adding or replacing water. When transporting or quarantining fish, use Seachem StressGuard. When adding new fish, use Stability. Both are ideal for use with Prime.


Available in Three Sizes

  • 100 mL
  • 250 mL
  • 500 mL


Directions for Use

  • Use 1 capful (5 mL) for each 200 L (50 US gallons) of new water. For smaller volumes, please note each cap thread is approximately 1 mL. 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.
  • 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.
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Product Questions

Can this product be used in a saltwater aquarium with soft corals, and snails ?
Question by: Michael on Jul 13, 2022, 11:01 PM
That is a great question. Yes it can be used in an aquarium with corals and snails if needed.
Answer by: Rick Pucciarella (BRS Staff) on Jul 14, 2022, 2:02 PM