--- product_id: 5838171 title: "API pH UP" brand: "api" price: "€ 45.98" currency: EUR in_stock: true reviews_count: 13 category: "Api" url: https://www.desertcart.at/products/5838171-api-ph-up store_origin: AT region: Austria --- # Safe for plants & fish 16 fl oz precise dosing Phosphate-free formula API pH UP **Brand:** api **Price:** € 45.98 **Availability:** ✅ In Stock ## Summary > 🌊 Elevate your aquarium’s vibe—because your fish deserve the best! ## Quick Answers - **What is this?** API pH UP by api - **How much does it cost?** € 45.98 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/5838171-api-ph-up) ## 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 - • **Easy-to-Use 16-Ounce Bottle:** Perfect size for consistent maintenance and long-lasting use. - • **Gentle Yet Effective pH Booster:** Slowly neutralizes acidity to protect delicate fish and plants from shock. - • **Phosphate-Free, Algae-Free Formula:** Keep your tank crystal clear without encouraging unwanted algae growth. - • **Trusted by Aquarists for Over 50 Years:** API’s research-driven solution ensures a thriving freshwater ecosystem. - • **Stabilize Your Aquarium’s pH Like a Pro:** Maintain ideal pH levels effortlessly with weekly testing and precise adjustments. ## Overview API pH UP Freshwater Aquarium Water pH Raising Solution is a 16-ounce, phosphate-free liquid designed to safely and effectively raise the pH level in freshwater aquariums. It prevents algae growth, protects fish and plants, and helps maintain a stable, healthy aquatic environment with easy weekly dosing. ## 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. Different geographies have different tap water conditions with different pH levels, while fish require a specific pH level to thrive. A pH of 7.0 is ideal when keeping a community aquarium containing a variety of tropical fish. Goldfish and livebearers prefer a pH of 7.5. Many desertcartian fish, like angelfish and neon tetras, prefer a pH of 6.5 to 6.8. Mollies and swordtails thrive at pH 7.2 to 7.5. API pH UP Freshwater Aquarium Water pH Raising Solution raises aquarium pH in freshwater aquariums to desired level. Safe for fish and plants. Use 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 over 50 years, API has been creating innovative, research-driven solutions that make it easier to care for your fish and aquarium. API Aquarium Treatment Supplies are designed to work in conjunction with each other to provide best results to control algae, promote healthy bacterial growth and help control and cure fish diseases and conditions such as ich and fin rot. They work to provide a safe, hospitable environment for fish such as tropical community fish, cichlids, goldfish and more. With API, you can spend more time admiring your fish, and less time scrubbing your tank. Make sure to use all products as directed in order to ensure the best results. Review: works great - works great raising my aquarium ph water in my area has very low ph put a little in my tank each weak to keep my ph stable Review: Easy to use & effective - Impressive product as it immediately helped increase my ph . Added in limited dosage as pkg suggested . Too quick a ph change probably not good for the fish so use intelligently . My ph had been low and caused cloudy conditions , but this solved that and clarity returned with normal ph . ## Features - Contains one (1) API pH UP Freshwater Aquarium Water pH Raising Solution 16-Ounce Bottle - Raises freshwater aquarium water pH with a phosphate-free formula - Does not promote algae growth with pH adjustments and is safe for plants and fish - Slowly neutralizes acidic substances that cause low water pH - Test water weekly and use to correct pH level in freshwater aquariums ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002ASGC2 | | ASIN | B0002ASGC2 | | Allergen Information | Apple Free | | Best Sellers Rank | #8,514 in Pet Supplies ( See Top 100 in Pet Supplies ) #65 in Aquarium Water Treatments | | Brand Name | API | | Customer Reviews | 4.6 4.6 out of 5 stars (3,628) | | Date First Available | June 15, 2004 | | Department | Unisex-Adult | | Global Trade Identification Number | 00017163020318 | | Is Discontinued By Manufacturer | No | | Item Form | Liquid | | Item Type Name | Aquarium pH adjuster | | Item Weight | 1.2 Pounds | | Item model number | 31B | | Liquid Volume | 16 Fluid Ounces | | Manufacturer | Mars Fishcare | | Manufacturer | Mars Fishcare | | Manufacturer Part Number | 31B | | Model Number | 31B | | Pet Type | Fish | | Product Dimensions | 2.5 x 2.5 x 8.75 inches; 1.2 Pounds | | Target Species | Fish | | UPC | 017163020318 | | Unit Count | 1 Count | ## Product Details - **Brand:** API - **Item Form:** Liquid - **Item Weight:** 1.2 Pounds - **Liquid Volume:** 16 Fluid Ounces - **Manufacturer:** Mars Fishcare ## Images ![API pH UP - Image 1](https://m.media-amazon.com/images/I/51MVfM5NJVL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: How long after using do you re- test to see how much the pH went up?** A: We would recommend waiting about a half-hour in order for the water to fully circulate so that you get an accurate reading. If you have a very large system or very little flow, you may want to wait 1-2 hours. You are safe to re-dose at that point as long as you have not changed more than 0.2 in pH, which is the maximum we recommend changing within a 24 hour period to reduce fish stress. If you have any other questions, feel free to reach out to us at 1-800-847-0659 or APITechServices@effem.com **Q: Can this be used in a tank with invertebrates?** A: Yes. Many years ago this was labeled for ponds **Q: This should be fine for a Brackish tank?** A: You can use it however the KH of a brackish tank might prevent you from lowering the ph. Please contact API at 1-800-847-0659 and we can help. **Q: does this come with both ph up and down? Or just one of the two?** A: Just one bottle,ph up! ## Customer Reviews ### ⭐⭐⭐⭐⭐ works great *by S***N on January 12, 2026* works great raising my aquarium ph water in my area has very low ph put a little in my tank each weak to keep my ph stable ### ⭐⭐⭐⭐⭐ Easy to use & effective *by P***Z on April 16, 2024* Impressive product as it immediately helped increase my ph . Added in limited dosage as pkg suggested . Too quick a ph change probably not good for the fish so use intelligently . My ph had been low and caused cloudy conditions , but this solved that and clarity returned with normal ph . ### ⭐⭐⭐⭐⭐ Great product great price *by T***N on January 14, 2026* Work in my fish tanks Love this product ## Frequently Bought Together - API pH UP Freshwater Aquarium Water pH Raising Solution 16-Ounce Bottle - API STRESS COAT Aquarium Water Conditioner 16-Ounce Bottle - API AMMO-LOCK Freshwater and Saltwater Aquarium Ammonia Detoxifier 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/5838171-api-ph-up](https://www.desertcart.at/products/5838171-api-ph-up) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-04-24*