Acid Buffer is a non-phosphate buffer to lower pH and buffer with Alkaline Buffer. Both buffers are designed for the planted aquarium or for very hard water where phosphate buffers may pose an algae or cloudiness problem. Acid Buffer lowers pH and buffers between 5.0 and 8.0 when used with Alkaline Buffer. As Acid Buffer lowers pH it converts carbonate alkalinity (KH) into available CO₂. It may also be used to safely lower pH in marine water.

What distinguishes Acid Buffer from other buffers is that it does not contain phosphates. This makes it ideal for the planted aquarium, where excess phosphate could contribute to undesirable algae growth.

To lower pH, use 1/4 teaspoon (2g) for every 80 L (20 gallons) daily until desired pH is reached (this dose lowers alkalinity by about 0.2 meq/L (0.6 dKH)). Larger doses may be required in very hard (KH) or alkaline waters. In order to adjust pH gradually, or if water is soft or not well buffered, use Acid Buffer with Alkaline Buffer. When using Alkaline Buffer & Acid Buffer together to target a specific pH, utilize the suggested ratio chart. This chart is based on use in RO or RO/DI water and ratios may need to be adjusted for use in tap water. HINT: First determine the amount of Alkaline Buffer needed for the volume of water. This should be determined based upon your desired alkalinity (KH). Then, divide by the number in the middle column to obtain the correct amount of Acid Buffer required.

Size : 300 Gm

Compatibility

Freshwater, including planted tanks — it is phosphate-free, so it does not bring the algae and cloudiness that phosphate buffers can.

It works by converting carbonate alkalinity into usable CO₂, which is a second benefit in a planted tank. Used with Alkaline Buffer it holds any pH between 6.0 and 8.0.

Freshness & Storage

Every batch we dispatch carries a minimum of 6 months’ remaining shelf life. Store this product in a cool, dry place away from direct sunlight, with the cap or inner foil closed tightly after each use.

Returns & Replacement

Returns are accepted within 7 days of delivery, provided the item is unused and in its original packaging. Manufacturer-sealed items cannot be returned once the seal is broken, and sale-priced items are not refundable.

If your item arrives defective or damaged, message us on WhatsApp with your order number — or email us, if you would rather — and we will replace it. Approved replacements are delivered within 3 to 5 business days. Transit damage is covered by insurance on every shipment. If tracking shows delivered but nothing reached you, tell us within 72 hours, which is the reporting window Indian couriers allow. Damage caused during installation or use is not covered; replacement spares for such cases are chargeable.

Full terms are on our Cancellation & Returns page.