Seachem Laboratories Alkaline Buffer Aquarium Water Treatment, 2.5 oz

Getting your freshwater tank dialed in shouldn't take a chemistry degree, and Seachem Laboratories Alkaline Buffer in the handy 2.5 oz size makes it approachable. This is a non-phosphate buffer made to raise pH and alkalinity (KH) for your aquarium. The compact 2.5 oz size is a great starting point for smaller tanks, for trying it out, or for keeping a backup on the shelf for when your numbers need a nudge.

• It raises pH and alkalinity (KH), helping the water your fish call home settle into a more stable, supportive range.
• As a non-phosphate buffer, the brand notes it is designed for the planted aquarium or for very hard water where phosphate buffers may pose an algae or cloudiness problem.
• It is made to buffer with Acid Buffer, so you get a two-part method to fine-tune your readings instead of guessing.
• Seachem says it buffers between 7.2 and 8.5, a workable window for many freshwater community tanks.
• The brand calls it gentle and safe, letting you treat your water with confidence rather than crossed fingers.
• It is meant to enhance the freshwater environment, supporting the tank you have already worked to build.
• The smaller 2.5 oz size is easy to store and ideal for nano and modest setups or first-time trials.
• Skipping phosphate makes it a thoughtful fit for planted tanks where algae and cloudiness are a worry.
• Used with Acid Buffer, it gives you more precise say over where your pH and alkalinity land.
• It fits neatly into a routine water-care kit, ready whenever your tank drifts off target.

Healthy freshwater fish start with water you can trust, and even a small bottle of the right buffer can make a real difference. Keep the 2.5 oz Seachem Alkaline Buffer on hand when you want a non-phosphate, planted-tank-friendly way to raise pH and alkalinity in a smaller, easy-to-manage size. Steady water is one of the kindest things you can give your fish.