Seachem Malawi/Victoria Buffer

Seachem Malawi/Victoria Buffer is a blend of carbonate salts that holds a hard water aquarium at the pH African Rift Lake cichlids evolved in. It raises carbonate hardness and buffer capacity along with pH, which is the part that matters: a tank with real KH behind it holds its pH steady between water changes instead of drifting down as the week goes on. Formulated to maintain pH 7.8 to 8.4. Browse our other water care.

Why KH Matters More Than pH

Chasing pH with a pH-only product is how people end up on a swing: the number moves, nothing holds it, and a few days later it has slid back. Carbonate hardness is the buffer that resists that slide. Malawi/Victoria Buffer raises KH at the same time it raises pH, so the value you set is the value the tank actually keeps. It is also why dosing drops off sharply once you are dialled in, usually to once every two or three weeks rather than daily.

Features

Dosing

Use 6 g, one level teaspoon, for each 40 to 80 L (10 to 20 US gallons) of water each day until the pH you want is reached and holding. After that, use as required to maintain it, which is usually no more than once every two to three weeks.

Tips from Seachem. Dissolve the buffer in fresh water before adding it. Use it when setting up the aquarium and when making water changes, preferably after adding a cichlid lake salt, and between water changes as needed. The pH it settles at inside the 7.8 to 8.4 band depends on how much you use.

To hold lower than 7.8, Seachem pairs this with their Acid Buffer. To hold higher than 8.4, use Tanganyika Buffer, formulated for the deeper, harder lake.

Choose Your Size

Teaspoon counts are the net weight divided by the 6 g dose. Each teaspoon treats 10 to 20 US gallons.

Specifications

Pairs With

• Seachem Tanganyika Buffer for Lake Tanganyika tanks at pH 9.0 to 9.4
• Fritz Rift Lake Cichlid Salt for the GH side this buffer leaves alone
• Seachem Cichlid Lake Salt, the matched Seachem salt for GH, dosed separately for each lake
• Seachem Cichlid Trace to restore the trace elements the tank uses up between water changes
• CaribSea African Cichlid Mix sand, an aragonite substrate that supports hard water
• Hikari Cichlid Staple and other cichlid foods
• Seachem Alkaline Buffer for planted and general freshwater tanks that need KH without the cichlid pH range
• KH and GH test kits, because buffering without testing is guesswork

FAQ

Will this raise my GH too?
No. Seachem formulates it to leave general hardness untouched. That is intentional, so you can set KH and GH independently, but it does mean you need a separate cichlid salt for the mineral side.

How often will I be dosing it?
Daily at first, until the pH reaches your target and stays there. After that it is usually no more than once every two to three weeks, plus whatever you add back with water changes.

Can I use it in a planted tank?
It will work as a buffer, but 7.8 to 8.4 is high for most planted setups and the high KH works against CO2 injection. For a planted tank, Seachem Alkaline Buffer is the better fit.

Is it safe for Tanganyika cichlids?
No. Tanganyika runs higher and harder, at pH 9.0 to 9.4. Use Tanganyika Buffer for those fish. This one is formulated for Malawi and Victoria. Seachem says the two can also be combined to target a pH between the ranges.

Do I add it straight to the tank?
Dissolve it in fresh water first, then add. Dumping dry powder onto the substrate gives you a local spike where the fish are.

What should I be testing?
KH and pH, and GH if you are also dosing a cichlid salt. pH alone will not tell you whether the buffer behind it is holding.