--- product_id: 259038974 title: "API pH Down 4oz" brand: "api" price: "$77" currency: FJD in_stock: true reviews_count: 3 url: https://fiji.desertcart.com/products/259038974-api-ph-down-4oz store_origin: FJ region: Fiji --- # Safe for freshwater fish & plants Compact 4oz liquid formula Precise pH adjustment API pH Down 4oz **Brand:** api **Price:** $77 **Availability:** βœ… In Stock ## Summary > 🐟 Keep your aquatic community thriving with precision pH control! ## Quick Answers - **What is this?** API pH Down 4oz by api - **How much does it cost?** $77 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [fiji.desertcart.com](https://fiji.desertcart.com/products/259038974-api-ph-down-4oz) ## 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 - β€’ **Tailored pH Control:** Easily fine-tune your aquarium’s pH to the perfect level for tropical fish, goldfish, and more. - β€’ **Weekly pH Stability:** Helps prevent harmful pH swings caused by waste and tap water changes, keeping your tank thriving. - β€’ **Compact & Convenient:** 4oz bottle fits seamlessly into your aquarium care kit without clutter. - β€’ **Trusted Brand Legacy:** API’s 50+ years of research-backed aquarium solutions ensure reliable, safe water treatment. - β€’ **Fish & Plant Friendly:** Formulated to protect delicate aquatic life while maintaining optimal water chemistry. ## Overview API pH Down 4oz is a liquid solution designed to safely lower and stabilize the pH level in freshwater aquariums. Ideal for various tropical fish species, it helps maintain an optimal aquatic environment by counteracting pH fluctuations caused by waste and water changes. Compact and easy to use, this trusted API product supports healthy fish and plant life with over 50 years of proven aquarium care expertise. ## 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 DOWN Freshwater Aquarium Water pH Reducing Solution lowers 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: Perfect - It is an amazing product for lowering the ph. Review: Dont use for hydroponics - Not for hydroponics ## Features - Brand: Vir Venture - Designed to perfection - Compact construction - Packed with features ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002AQMV4 | | Brand | API | | Brand Name | API | | Customer Reviews | 3.8 out of 5 stars 8 Reviews | | Global Trade Identification Number | 00317163030301 | | Item Form | Liquid | | Item Weight | 0.3 Pounds | | Item form | Liquid | | Item weight | 0.3 Pounds | | Liquid Volume | 118 Milliliters | | Liquid volume | 118 Milliliters | | Manufacturer | API | | Manufacturer Part Number | 30C | | Model Number | 30C | | Number of Items | 1 | | Number of Packs | 1 | | Pet Type | Fish | | Target Species | Fish | | UPC | 317163030301 | | Unit Count | 1 Count | | Unit count | 1 Count | ## Product Details - **Brand:** API - **Item form:** Liquid - **Item weight:** 136 g - **Liquid volume:** 118 Milliliters - **Manufacturer:** API ## Images ![API pH Down 4oz - Image 1](https://m.media-amazon.com/images/I/71bFz9XJJBL.jpg) ![API pH Down 4oz - Image 2](https://m.media-amazon.com/images/I/51cwy3A03VL.jpg) ![API pH Down 4oz - Image 3](https://m.media-amazon.com/images/I/81vGj7jp3yL.jpg) ![API pH Down 4oz - Image 4](https://m.media-amazon.com/images/I/91PmUNmU56L.jpg) ![API pH Down 4oz - Image 5](https://m.media-amazon.com/images/I/81arn3qWjLL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect *by M***N on 27 January 2024* It is an amazing product for lowering the ph. ### ⭐⭐⭐ Dont use for hydroponics *by M***D on 30 October 2022* Not for hydroponics ### ⭐⭐ Dangerous *by M***D on 24 January 2026* Average ## Frequently Bought Together - API pH DOWN Freshwater Aquarium Water pH Reducing Solution 4-Ounce Bottle - API AMMONIA 130-Test Freshwater and Saltwater Aquarium Water Test Kit --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://fiji.desertcart.com/products/259038974-api-ph-down-4oz](https://fiji.desertcart.com/products/259038974-api-ph-down-4oz) --- *Product available on Desertcart Fiji* *Store origin: FJ* *Last updated: 2026-10-15*