Seachem Marine Buffer

4 reviews

Seachem Marine Buffer is the safe and stable way of raising pH in your marine aquarium, creating the optimum environment for marine corals and fish in which they can thrive.


  • Marine Buffer 250g 10% OFF With Code
    code: 20544 In stock Only 3 left in stock
  • Marine Buffer 500g 10% OFF With Code
    code: 343 In stock Only 4 left in stock

Product Information

Seachem Marine Buffer is the safe and stable way of raising marine pH to 8.3 in your aquarium. With years of research and expertise in aquatic treatments, you can be confident of the best results.

Marine Buffer is a blend of sodium, magnesium, calcium, strontium, and potassium salts of carbonate, bicarbonate, chloride, sulfate, and borate. This combination works perfectly together to ensure the most stable and beneficial water conditions.

Marine Buffer was the first buffer on the market which contained borate salts (which make a saltwater buffering system much more stable), and it remains the most effective pH buffer available for marine aquariums.


  1. Add 5 g (1 level teaspoon) for each 80 L.
  2. Dissolve in at least one cup of freshwater - this dose will also raise alkalinity by about 1 meq/l.
  3. Add daily until pH stabilizes at 8.3.
  4. This will take from a day to a week, depending on original pH and alkalinity.
  5. From then on use monthly to maintain a pH of 8.3.
  6. If you find this inadequate, check other reasons such as over stocking or over feeding.
  7. Effectiveness improves with continued use.

Do not directly mix with any calcium, magnesium, or strontium supplement.

Latest Customer Reviews

  • Rating
    Date 15/03/2016 09:03am
    Seachem Marine Buffer 250g
    Feefo Logo
    Brilliant product. Did what I wanted it to do.
  • Rating
    Date 07/10/2015 15:10pm
    Seachem Marine Buffer 250g
    Feefo Logo
    Works very well......highly satisfied
  • Rating
    Date 08/07/2015 15:07pm
    Seachem Marine Buffer 500g
    Feefo Logo
    Bought many times previously
  • Rating
    Date 26/11/2014 11:11am
    Seachem Marine Buffer 250g
    Feefo Logo
    very good