Seachem Prime

110 reviews

Seachem Prime helps condition your water for use in freshwater and marine fish tanks, removing the dangerous levels of chlorine and ammonia in the water, detoxifying it so it is safe for your fish and corals. Use correct doseage for best effects.


  • Prime 50ml
    code: Sea434 In stock Only 1 left in stock
  • Prime 100ml
    code: Sea435 Out of stock (Notify me)
  • Prime 250ml
    code: Sea436 In stock Only 2 left in stock
  • Prime 500ml
    code: Sea433 In stock Only 3 left in stock
  • Prime 1L
    code: 20045 In stock Only 1 left in stock
  • Prime 4ltrs
    code: 20048 In stock Only 1 left in stock

Product Information

Seachem Prime is a complete and concentrated conditioner for both fresh and salt water aquariums, to remove ammonia, chlorine and chloramine.

It converts ammonia to a safe, non-toxic product that is removed easily by the filter. It is ideal to use during water cycling to regulate ammonia and nitrate levels.

Prime detoxifies nitrite and nitrate, allowing the biofilter to more efficiently remove them. It will also detoxify any heavy metals found in the tap water at typical concentration levels.Prime also promotes the production and regeneration of the natural slime coating on certain types of fish, keeping them in the best of health.


  • A single 50ml bottle with treat up to 2000 litres / 440 gallons of tap water
  • A single 100 ml bottle will treat up to 4000 litres / 880 gallons of tap water
  • A single 250ml bottle with treat up to 10000 litres / 2200 gallons of water
  • A single 500ml bottle with treat up to 20000 litres / 4400 gallons of water


  • Use 1 capful (5 ml) for each 200 litres of new water. This removes approximately 1 mg per litre ammonia, 4 mg per litre of chloramine, or 5 mg per litre of chlorine
  • For smaller doses, please note each cap thread is approximately 1 ml
  • May be added to aquarium directly
  • For exceptionally high chloramine concentrations, a double dose may be used safely

Latest Customer Reviews

  • Rating
    Date 11/04/2017 19:04pm
    Seachem Prime 1L
    Feefo Logo
    Great product use nothing else
  • Rating
    Date 09/11/2016 05:11am
    Seachem Prime 4ltrs
    Feefo Logo
    It works, what else do I need to say to fill in the 17 characters