--- product_id: 17805357 title: "Alkaline Buffer 600gram" brand: "seachem" price: "£22.80" currency: GBP in_stock: true reviews_count: 13 category: "Seachem" url: https://www.desertcart.co.uk/products/17805357-alkaline-buffer-600gram store_origin: GB region: Great Britain --- # phosphate-free for planted tanks boosts alkalinity (KH) pH control 7.2–8.5 Alkaline Buffer 600gram **Brand:** seachem **Price:** £22.80 **Availability:** ✅ In Stock ## Summary > 🌊 Elevate your aquarium’s vibe — stable, clear, and thriving like never before! ## Quick Answers - **What is this?** Alkaline Buffer 600gram by seachem - **How much does it cost?** £22.80 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/17805357-alkaline-buffer-600gram) ## Best For - seachem enthusiasts ## Why This Product - Trusted seachem brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Alkalinity Amplifier:** Increase carbonate hardness (KH) to maintain a resilient, balanced freshwater environment. - • **Precision pH Mastery:** Effortlessly stabilize your aquarium’s pH between 7.2 and 8.5 for optimal aquatic health. - • **Phosphate-Free Formula:** Protect your planted aquarium from algae blooms and water cloudiness with a clean, safe buffer. - • **Fish-Friendly & Versatile:** Safe for all life stages and species, from delicate plants to your prized fish and invertebrates. - • **Instant & Long-Lasting Effect:** Experience rapid pH adjustment with stability that lasts through weekly water changes and top-offs. ## Overview Seachem Alkaline Buffer 600g is a phosphate-free powder designed to raise and stabilize aquarium pH between 7.2 and 8.5 while increasing alkalinity (KH). Ideal for planted freshwater tanks and hard water conditions, it prevents algae growth and cloudiness, ensuring a safe, balanced environment for fish and plants. Trusted by aquarists for fast, lasting results and easy dosing. ## Description Alkaline Buffer™ is a non–phosphate buffer to raise pH and alkalinity (KH) and buffer with Acid Buffer™. These buffers are designed for the planted aquarium or for very hard water where phosphate buffers may pose an algae or cloudiness problem. Alkaline Buffer™ raises pH and buffers between 7.2 and 8.5. It is gentle, safe, and enhances the freshwater environment. Review: Better Than Expected - I was using PH Up and PH Down Liquids at first but they did little or nothing (Only used PH UP) - My 20 Gal Freshwater Tank is a beast when it comes to keeping the water parameters in check, but, as anyone in this Hobby knows, the smaller tanks need more attention. I got the Alkaline Buffer and it is Amazingly Effective. It's results are instantaneous, safe for the fish even when I boost from 6.8 to 7.8 in a single dose - Also the Tank stays Stable longer - This Tank is Notorious for Dropping in PH - So now when I do a Water Top Off (2 Gallons Weekly) and a 20-25% Water Change (4-5 Gallons Weekly) I add 1/2 Teaspoon and 1 Teaspoon respectively and it stays Stable at a very Comfortable 7.6-7.8. The Bottle has a Ton of Quickly Dissolving Powder in it that I am guessing will last at least a couple years at the rate I am using it. NOTE:- This will make your water Very Cloudy for a short period of time - it is Harmless to the Fish and Dissipates after a couple hours. Chinese Oranda's like a PH near 8.0 - the rest of the Fish, Snails and my Two Fiddlers like it around 7.0 or higher a bit, so Everybody is Quite Happy at 7.6-7.8. Review: works well. use as directed - helped me stabilize my ph. ## Features - Adjusts pH to 7.2—8.5 - Designed for use in planted aquariums - Increases alkalinity - Contains no phosphate ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002Z7UC4 | | ASIN | B0002Z7UC4 | | Age Range Description | all stages | | Best Sellers Rank | #54,722 in Pet Supplies ( See Top 100 in Pet Supplies ) #544 in Aquarium Water Treatments | | Brand Name | Seachem | | Color | white | | Customer Reviews | 4.7 4.7 out of 5 stars (585) | | Date First Available | June 15, 2004 | | Date First Available | June 15, 2004 | | Directions | To increase pH, use 1 teaspoon (6 g) for every 80 L (20 gallons) daily until desired pH is reached (this dose raises alkalinity by about 1 meq/L (2.8 dKH)). For precise dosing, use the Seachem Digital Spoon Scale. | | Included Components | all | | Is Discontinued By Manufacturer | No | | Item Dimensions LxWxH | 6.4 x 2.9 x 2.9 inches | | Item Package Dimensions L x W x H | 6.34 x 2.95 x 2.95 inches | | Item Weight | 0.6 Kilograms | | Item model number | 233 | | Item model number | 233 | | Manufacturer | Seachem Laboratories, Inc. | | Manufacturer | Seachem Laboratories, Inc. | | Material | Cotton | | Model Name | Alkaline Buffer 600g | | Number of Items | 1 | | Product Dimensions | 6.4 x 2.9 x 2.9 inches; 1.32 Pounds | | Size | 600 grams | | Specific Uses for Product | Active | | Target Audience Keyword | fish, house-cats | ## Product Details - **Brand:** Seachem - **Item Form:** Powder - **Item Weight:** 0.6 Kilograms - **Liquid Volume:** 600 Milliliters - **Manufacturer:** Seachem Laboratories, Inc. ## Images ![Alkaline Buffer 600gram - Image 1](https://m.media-amazon.com/images/I/71mKe2C0HJL.jpg) ## Questions & Answers **Q: How many gallons does this 600 grams treat?** A: I HAVE A 55 GALLON AND IT WORKS GREAT BRINGS UP THE PH WITH NO PROBLEM WHEN THE WATER US YELLOW PUT IN TWO TEASPOONS AND IT DOES THE JOB **Q: How long does the desired ph last in the tank? A day ? A week ?** A: Hard to say, I did a 20% water change every week. This product makes the water higher in pH. **Q: Does this need to be used at every water change or top off??** A: I use it after water changes but I always check the KH of the water before adding the product. It is very powerful stuff so I suggest following the directions on the back. I try to keep my KH around 4-6 along with my GH. I would not put this in every time you top off. **Q: I used too much seachem alkaline buffer and now my kh is too high. how do i remedy this other than a water change?** A: You could add Seachem acid buffer to bring it down. Most use the two together to get to correct alkalinity & ph desired. See Seachem website for amounts to use if both buffers. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Better Than Expected *by B***V on September 24, 2020* I was using PH Up and PH Down Liquids at first but they did little or nothing (Only used PH UP) - My 20 Gal Freshwater Tank is a beast when it comes to keeping the water parameters in check, but, as anyone in this Hobby knows, the smaller tanks need more attention. I got the Alkaline Buffer and it is Amazingly Effective. It's results are instantaneous, safe for the fish even when I boost from 6.8 to 7.8 in a single dose - Also the Tank stays Stable longer - This Tank is Notorious for Dropping in PH - So now when I do a Water Top Off (2 Gallons Weekly) and a 20-25% Water Change (4-5 Gallons Weekly) I add 1/2 Teaspoon and 1 Teaspoon respectively and it stays Stable at a very Comfortable 7.6-7.8. The Bottle has a Ton of Quickly Dissolving Powder in it that I am guessing will last at least a couple years at the rate I am using it. NOTE:- This will make your water Very Cloudy for a short period of time - it is Harmless to the Fish and Dissipates after a couple hours. Chinese Oranda's like a PH near 8.0 - the rest of the Fish, Snails and my Two Fiddlers like it around 7.0 or higher a bit, so Everybody is Quite Happy at 7.6-7.8. ### ⭐⭐⭐⭐⭐ works well. use as directed *by J***. on April 20, 2025* helped me stabilize my ph. ### ⭐⭐⭐⭐⭐ Instant pH boost! *by K***K on July 26, 2022* I have been raising mystery snail babies and the bioload from so many in one tank was making the pH plummet. Which is horrible for their shells. I tried a pH+ liquid that did nothing. Then I saw a recommendation for this stuff and I was desperate. One little scoop of this in their tank and the pH and KH went up! What a life saver this was for my snail babies last month at home before going off to find new homes. I’m using this in my other tanks now too. Amazing product and boosts that pH within minutes!!!! ## Frequently Bought Together - Seachem Alkaline Buffer 600gram - Seachem Equilibrium 600gram - Seachem Acid Buffer 600gram --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/17805357-alkaline-buffer-600gram](https://www.desertcart.co.uk/products/17805357-alkaline-buffer-600gram) --- *Product available on Desertcart Great Britain* *Store origin: GB* *Last updated: 2026-05-01*