Seachem Seachem Marine Buffer
Seachem [11442-503279]

Seachem Marine Buffer

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Seachem Marine Buffer will safely raise the pH of saltwater to 8.3, and will not raise the pH above 8.3 even if overdosed. Marine Buffer is a blended product, and contains sodium, magnesium, calcium, strontium, and potassium salts to provide effective results.

  • Safely raises & maintains saltwater pH to 8.3
  • More stable than sodium bicarbonate or sodium bicarbonate substitutes
  • Will not raise pH above 8.3 even if inadvertently overdosed


Seachem Marine Buffer is not just sodium bicarbonate or sodium carbonate (commonly sold as a substitute), as these products can raise pH to dangerous levels if not used properly. Instead it includes a variety of minerals and potassium salts of carbonate, bicarbonate, chloride, sulfate, and borate for safe, accurate dosing.

Directions: Add 5g (1 level teaspoon) for each 20 gallons (80 L). Dissolve in at least one cup of freshwater. This dose will also raise alkalinity by about 1 meq/L. Add daily until pH stabilizes at 8.3. This will take from a day to a week, depending on original pH and alkalinity. Thereafter, use biweekly or monthly to maintain a pH of 8.3. If this practice is not adequate, then overstocking, overfeeding, or other poor management practice should be sought as a likely cause. In ionically balanced marine water, Marine Buffer produces little precipitate or cloudiness. If an extensive precipitate forms upon addition of Marine Buffer that does not dissolve within about 15 minutes, then poor ionic balance was present. A water change should be initiated when convenient before further use of the product. Effectiveness improves with continued use. Do not directly mix with any calcium, magnesium, or strontium supplement.

Note: Product is sold by weight, not volume. Contents may settle in shipment.

Price:$6.35 to $235.00
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250 Grams (8.8 oz)
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Status:In Stock
Model:346
UPC:000116034609
Sku: SC03460
Id: 503280

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500 Grams (1.1 lbs)
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Model:343
UPC:000116034302
Sku: SC03430
Id: 512195

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1 kg (2.2 lbs)
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Model:347
UPC:000116034708
Sku: SC03470
Id: 503281

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BULK - 12 kg - (12 x 1 kg)
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Model:03470M
UPC:688713100516
Sku: SC03470M
Id: 589196

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4 kg (8.8 lbs)
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Model:349
UPC:000116034906
Sku: SC03490
Id: 610564

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