Will Marine Buffer raise pH above 8.3 if I overdose?

No. Seachem Marine Buffer is formulated to stop at pH 8.3, so even an accidental overdose will not push pH higher.

Is it safe for reef tanks?

Yes. It is designed for use in all saltwater aquariums, including reef tanks, and contains magnesium to help reduce precipitation.

How is it different from baking soda?

Baking soda is sodium bicarbonate and can drive pH toward 7.8. Marine Buffer is a blend of carbonate, bicarbonate, borate, and other salts that drives pH to 8.3 and adds stability.

Does it affect alkalinity?

Yes. It contributes to total alkalinity, so you should test alkalinity along with pH and adjust dosing accordingly.

Can I use it with other Seachem products?

Yes. Seachem suggests using MultiTest Marine pH & Alkalinity to check levels and Marine Trace to restore trace elements.

Where is the Seachem Marine Buffer cheapest?

At SaltwaterAquarium.com, for $7.47, 25% under what the other stores charge, as of our latest check.

What do buyers say about the Seachem Marine Buffer?

Rated 4.5 out of 5 from 8 ratings.

Where can I buy the Seachem Marine Buffer?

18 stores we checked sell it, including SaltwaterAquarium.com, Amazon, That Fish Place, The Hidden Reef, Fish Tanks Direct.

Seachem Marine Buffer

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$7.47at SaltwaterAquarium.comChecked 1 h ago

25% under what the other stores charge

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What reviewers say

Reviewers generally find Seachem Marine Buffer reliable for maintaining pH at 8.3 in saltwater tanks. Many praise its safety and stability, especially in reef setups, while some note it raises alkalinity and needs careful dosing.

What people mention

PH stabilityPraisedUsers report it keeps pH locked at 8.3 without spikes.
SafetyPraisedReviewers appreciate that overdosing will not push pH above 8.3.
AlkalinityMixedSome note it raises total alkalinity, requiring monitoring.
DosingMixedA few find the dosing instructions unclear for their tank volume.
PrecipitationCriticisedSome users report precipitation if the powder is not dissolved thoroughly.

About the Seachem Marine Buffer

Seachem Marine Buffer raises and maintains pH at 8.3 in saltwater aquariums, and it is safe to use in reef tanks. It will not raise pH above 8.3, even if overdosed. It is a blended product, not just sodium bicarbonate or sodium carbonate.

The blend contains sodium, magnesium, calcium, strontium and potassium salts of carbonate, bicarbonate, chloride, sulfate and borate. Borate adds stability to the buffering system. Magnesium helps alleviate the effects of precipitation. The blend is set slightly above 8.3 to offset the bicarbonate that most salt mixes add at each water change.

To dose, dissolve it in at least one cup of freshwater and add it to the tank. Add it daily until pH stabilizes at 8.3, which takes from a day to a week depending on the starting pH and alkalinity. After that, use it biweekly or monthly to maintain pH. Do not mix it directly with any calcium, magnesium or strontium supplement.

Purpose

Raises and maintains pH at 8.3 in saltwater aquariums

Suitable for

All saltwater aquariums, including reef tanks

Contains

Sodium, magnesium, calcium, strontium and potassium salts of carbonate, bicarbonate, chloride, sulfate and borate

Package sizes

50 g, 250 g, 500 g, 1 kg, 4 kg

Dose

5 g (1 level teaspoon) per 80 L (20 US gallons)

Alkalinity effect

One dose raises alkalinity by about 1 meq/L