--- product_id: 48701621 title: "API Proper pH 6.5 260g" brand: "api" price: "€ 18.68" currency: EUR in_stock: true reviews_count: 13 category: "Api" url: https://www.desertcart.at/products/48701621-api-proper-ph-6-5-260g store_origin: AT region: Austria --- # Maintains water balance for fish health Precise pH 6.5 stabilization Detoxifies chlorine & heavy metals API Proper pH 6.5 260g **Brand:** api **Price:** € 18.68 **Availability:** ✅ In Stock ## Summary > ⚡ Transform your tank into a thriving aquatic paradise! ## Quick Answers - **What is this?** API Proper pH 6.5 260g by api - **How much does it cost?** € 18.68 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/48701621-api-proper-ph-6-5-260g) ## Best For - api enthusiasts ## Why This Product - Trusted api brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Water Care:** Quickly adjusts pH with easy dosing—perfect for new setups, water changes, or pH corrections. - • **Toxic-Free Tank Guarantee:** Neutralizes harmful chlorine, chloramines, and heavy metals to create a safe aquatic environment. - • **Perfect pH Balance, Always:** Sets and stabilizes aquarium water to an ideal 6.5 pH for vibrant, thriving freshwater fish. - • **Keep Your Fish Happy & Breeding:** Stabilized pH reduces stress and fish loss, encouraging natural breeding and long-term vitality. - • **Trusted by Aquarists for 60 Years:** Backed by API’s legacy of premium, proven aquarium solutions for healthy, colorful fish. ## Overview API Proper pH 6.5 is a freshwater aquarium water treatment that precisely sets and stabilizes pH at 6.5, ideal for species like Tetras and Discus. It detoxifies tap water by removing chlorine, chloramines, and heavy metals, ensuring a safe, balanced environment. Designed for freshwater tanks without live plants, it supports fish health, reduces stress, and promotes vibrant coloration and breeding success. ## Description Product Description pH is the measure of acidity of water, on a scale ranging from 0 to 14. A pH of 0 is the most acidic, while a pH of 14 is the most alkaline. Water with a pH of 7.0 is considered "neutral". Different geographies have different tap water conditions with different pH levels, while fish require a specific pH level to thrive. API PROPER pH 6.5 Freshwater Aquarium pH Stabilizer automatically sets and stabilizes the pH level in freshwater aquariums to 6.5 which is perfect for Tetras, Discus, Rasboras and Angelfish. API PROPER pH 6.5 Freshwater Aquarium pH Stabilizer also removes toxic compounds from tap water such as chlorine, neutralizes chloramines, detoxifies heavy metals, and adds electrolytes, making tap water safe for fish. Use this aquarium treatment when setting up a new aquarium, adjusting pH, or changing water. pH in an aquarium can fluctuate due to fish waste, uneaten food and addition of tap water. It is recommended to test water for pH weekly. With API aquarium products, it’s easy to keep a beautiful saltwater, freshwater or reef aquarium. For almost 60 years API has developed premium solutions with proven and effective results for your family and ours. API offers a range of testing kits, water conditioners, and nutritionally superior food, because we’re dedicated to making a better underwater world. They work to provide a safe, hospitable environment for fish such as tropical community fish, cichlids, goldfish and more. At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too. Directions Containment and use for new aquariums, pH adjustment in established aquariums, and water changing; exclusive use in freshwater aquariums without live plants. Follow product instructions for specific usage and dosage amounts. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Box Contains 1 x API Proper pH 6.5 Aquarium Freshwater Stabilizer 240 g See more Review: Excellent - I needed to lower the pH in one of my aquariums to create the ideal environment for my new German Blue Rams, so I decided to give this product a try. It worked wonders! With just a small amount added to the water, the pH dropped from 7.8 to 6.4 almost instantly. This product is absolutely incredible, and I highly recommend it to anyone looking for a quick and effective way to adjust their aquarium’s pH. It’s a game-changer! Review: Perfect, solved our fish loss problem - Our waters pH from the tap is at the highest range on the test kits. At the time we were new to fish keeping and so we had problems with ammonia and nitrite, the additives we used lowered the pH to the lower range, but did not remain constant so it fluctuated from high to low, which when reading up on pH levels was very bad for the fish. From our research for our fish it seemed that a lower pH would be better for them, and to maintain it. This product has done just that, and remains constant at the 6.5 level between water changes which we do once a month and with that water change as per the instructions we add a little more. We had put off buying it for a long time because when reading up on pH it seemed difficult to maintain and could be more harmful to the fish if the levels did not maintain themselves and many believed it best to leave well alone, but we had suffered far too many fish losses and was desperate to try and get the tank into balance to keep the remaining fish alive and there is no doubt in our minds that using this product was the turning point for us, and we haven't had any more fish losses since using it, in fact the opposite we now have 25 babies born in the tank. ## Features - Causes serious eye irritation. - Causes skin irritation. - May cause respiratory irritation. - Contains one API Proper pH 6.5 Freshwater Aquarium Water pH Stabilizer 8.5-Ounce Container - Sets and stabilizes water pH to 6.5 to help keep fish healthy and colourful - Removes toxic compounds from tap water to make it safe for fish - Use exclusively in freshwater aquariums that do not contain live plants ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002AQMW8 | | Allergen Information | Allergen-Free | | Batteries Included | No | | Batteries required | No | | Best Sellers Rank | 21,558 in Pet Supplies ( See Top 100 in Pet Supplies ) 253 in Aquarium Water Treatments | | Customer Reviews | 4.3 4.3 out of 5 stars (4,372) | | Date First Available | 19 Jan. 2011 | | Item Form | Liquid | | Item Weight | 272 g | | Item model number | 35C | | Number of Items | 1 | | Pet Life Stage | All Life Stages | | Pet Type | Fish | | Product Dimensions | 5.4 x 5.4 x 12.7 cm; 272.16 g | | Quantity | 1 | | Size | 240 g | | Specific Uses | Indoor | ## Product Details - **Brand:** API - **Item form:** Liquid - **Item weight:** 272 g - **Manufacturer:** API - **UPC:** 317163030356 ## Images ![API Proper pH 6.5 260g - Image 1](https://m.media-amazon.com/images/I/817PpQEvZOL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: I have just recieved it and it says can not be used with Aquarians with live plants? Anyone else tried it with live plants?** A: My aquarium contains Marimo moss. This is not affected by ph 6.5. I really can not see how this product can affect live plants. I would chance it. Your fish welfare takes priority. Good luck. **Q: Can you use this with 'tap water conditioner' as they both remove chlorine and detoxify heavy metals?** A: My husband uses the ph 6.5 and puts tap water in with this before doing a water change and its fine **Q: my tap water is 6.2 i assume this will raise it? also do i still use tap water conditioner with this as the description says it also removes chlorine?** A: Yes it will and I always use both and my tank is well established with healthy fish and plants **Q: Can you use direct into ro water** A: No don't put directly in. Dissolve in hot/ boiling water and then mix some existing water with it before adding. I use whenever I clean my tank out, take some buckets of water out and then replace water with water conditioner and API proper PH ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent *by C***S on 22 June 2025* I needed to lower the pH in one of my aquariums to create the ideal environment for my new German Blue Rams, so I decided to give this product a try. It worked wonders! With just a small amount added to the water, the pH dropped from 7.8 to 6.4 almost instantly. This product is absolutely incredible, and I highly recommend it to anyone looking for a quick and effective way to adjust their aquarium’s pH. It’s a game-changer! ### ⭐⭐⭐⭐⭐ Perfect, solved our fish loss problem *by A***R on 3 December 2012* Our waters pH from the tap is at the highest range on the test kits. At the time we were new to fish keeping and so we had problems with ammonia and nitrite, the additives we used lowered the pH to the lower range, but did not remain constant so it fluctuated from high to low, which when reading up on pH levels was very bad for the fish. From our research for our fish it seemed that a lower pH would be better for them, and to maintain it. This product has done just that, and remains constant at the 6.5 level between water changes which we do once a month and with that water change as per the instructions we add a little more. We had put off buying it for a long time because when reading up on pH it seemed difficult to maintain and could be more harmful to the fish if the levels did not maintain themselves and many believed it best to leave well alone, but we had suffered far too many fish losses and was desperate to try and get the tank into balance to keep the remaining fish alive and there is no doubt in our minds that using this product was the turning point for us, and we haven't had any more fish losses since using it, in fact the opposite we now have 25 babies born in the tank. ### ⭐⭐⭐⭐⭐ Works well as long as you don’t expect instant results. *by G***A on 5 February 2024* This is a good product, as long you don’t expect it to work over night. The way I found worked well was get containers for weekly water changes. Fill the containers the night before a water change, add all your water conditioner, and add this product. This also prevents shock, as the water becomes room temp, giving your thermostat less work to do, This stabilises the water in the containers to 7.0ph. Obviously it’s not an over night fix which some people think it is but give it 2-4 weeks of weekly water changes and you’ll have 7.0ph continuous. Hope this helps ## Frequently Bought Together - API PROPER pH 6.5 Freshwater Aquarium Water pH Stabilizer 8.5-Ounce Container - API STRESS COAT Aquarium Water Conditioner 16-Ounce Bottle - API QUICK START Freshwater and Saltwater Aquarium Nitrifying Bacteria 16-Ounce Bottle --- ## 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.at/products/48701621-api-proper-ph-6-5-260g](https://www.desertcart.at/products/48701621-api-proper-ph-6-5-260g) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-04-22*