--- product_id: 3569797 title: "API POND ALGAEFIX (1 gallon) Pond Algae Control - Copper Free - Clean, Clear Water - Up to 38400 Gallons - Safe for Fish, Plants - Water Gardens, Fountains - Natural Active Ingredient - EPA-Registered" brand: "api" price: "$236.36" currency: USD in_stock: true reviews_count: 12 category: "Api" url: https://www.desertcart.us/products/3569797-api-pond-algaefix-1-gallon-pond-algae-control-copper-free store_origin: US region: United States of America --- # Fast-acting algae control in 3 days Copper-free, safe for plants & fish Treats up to 38,400 gallons API POND ALGAEFIX (1 gallon) Pond Algae Control - Copper Free - Clean, Clear Water - Up to 38400 Gallons - Safe for Fish, Plants - Water Gardens, Fountains - Natural Active Ingredient - EPA-Registered **Brand:** api **Price:** $236.36 **Availability:** ✅ In Stock ## Summary > 🌊 Clear water, happy fish, zero compromises! ## Quick Answers - **What is this?** API POND ALGAEFIX (1 gallon) Pond Algae Control - Copper Free - Clean, Clear Water - Up to 38400 Gallons - Safe for Fish, Plants - Water Gardens, Fountains - Natural Active Ingredient - EPA-Registered by api - **How much does it cost?** $236.36 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/3569797-api-pond-algaefix-1-gallon-pond-algae-control-copper-free) ## 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 - • **Eco-Safe Formula:** EPA-registered and copper-free, protecting your aquatic ecosystem without compromise. - • **Rapid Algae Eradication:** Clears stubborn green water, string, and blanket weed algae in just 3 days. - • **Sustained Crystal Clarity:** Easy maintenance dosing keeps your pond pristine week after week. - • **Trusted Aquatic Expertise:** Backed by 60 years of API innovation for healthier, clearer water. - • **Massive Coverage, Minimal Effort:** One gallon treats up to 38,400 gallons—perfect for large ponds and fountains. ## Overview API POND ALGAEFIX is a powerful, copper-free algae treatment designed to clear and maintain up to 38,400 gallons of pond or fountain water. Its EPA-registered formula rapidly eliminates various algae types within days while being safe for fish, plants, and beneficial bacteria. Trusted for over 60 years, this fast-acting solution ensures crystal-clear water and a thriving aquatic environment with minimal maintenance. ## Description With API POND products, it’s easy to keep a beautiful pond. 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 koi, catfish, perch, goldfish and more. At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too. Review: Great Product! - Great product, cleared my pound of an insane amount of hair algae in 3 days. Water lilies and fish show no signs of stress. Review: This DOES remove ALGEA without affecting the wildlife - I'm very impressed. - This stuff is fantastic. I have a 7,000 gallon koi pond with 22 koi ranging from 12" to 30" in length. Average is 20". I'm a heavy feeder, I also feed twice per day. The pond is in full sunlight and circulates 8,000 gallons per hour via a 100' long 3' wide river with a 3' wide waterfall. What does all that mean. It means the water get's plenty of oxygen and sunlight and therefore grows green algae by the ton! The normal water color for the past 7 years has been pea green! I have lots of filtration, a huge UV filter and I've used hundreds of dollars of good bacteria. NOTHING kept the algae out for the past 7 years. ----> this year I decided to try a chemical to clear the water or get rid of the pond. I read everything I could find and decided this was the best chemical “experiment”: " poly oxyethylene(dimethyliminio)ethylene(dimethyliminio)ethylene dichloride ". This chemical is packaged under several different names and a concentrated version can be purchased at swimming pool suppliers. (concentrated is 20%, much thicker, more like syrup) The chemical kills algae AND causes it to clump and float to the surface as foam. It will clog your pond filter in a blink because of the clumped foam dead algae. Be prepared to clean the filter often. The chemical is "consumed" as it kills algae and my water was so green I added 7 times the dosage over a period of 3 weeks. The color tuned from pea green to a gray green slowly. I had to clean the filter every couple of days for about a month. ===>>> the water is now crystal clear. I now add about 3 ounces every 2 weeks and the water stays crystal clear. Every time I add there's a little foam on the surface, the filter clogs up within 48 hours, I clean it about 60%, not 100%, and I'm good for another 2 weeks. I'm very pleased with the results, ===>> How did the fish and plants do? It never phased them one bit. Not one bit. They didn't come up gulping for oxygen, it didn't faze any of the many frogs or billions of snails that inhabit the river, NONE of the lilies or water lettuce or other plants were affected in any way. I don’t have any experience with other fish other than koi. This is the chemical, sold under several different names: " poly oxyethylene(dimethyliminio)ethylene(dimethyliminio)ethylene dichloride " The dosage will vary by vendor depending on the concentration. The 3oz per 7000 gallons every two weeks I use is a 20% concentration I purchased at a swimming pool supply store sold under a different brand name. I have tried three different brands of this chemical (including this one) and they all work exactly the same. The only difference is the dosage which varies based on the concentration, ranging from 4% to 20%. Attached, 2 pictures, before and 45 days later, after. ## Features - API POND ALGAEFIX – Helps resolve algae problems and controls the formation of new algae; works fast without harm to fish, aquatic plants, surrounding wildlife, or pets when used as directed; includes one gallon for treating up to 38,400 gallons - Fast and Effective – Controls most types of algae, including green water (Chlorella), string and hair algae (Cladophora), blanket weed algae (Oedogonium) in ponds, koi ponds, and fountains - Safety First – EPA-registered and copper-free formula is safe for fish and plants when used as directed and won't disrupt beneficial bacteria or accumulate in pond sediment - How to Use – Ensure that the pond/fountain has vigorous aeration; mix thoroughly into the pond/fountain and disperse evenly; repeat every 3 days until algae is controlled, then dose weekly to keep ponds/fountains clear and reduce maintenance​ - Why API Products? – For over 60 years, we've been a leader in the aquatics industry, developing and perfecting products and solutions for indoor aquariums and outdoor ponds. Today, our family of products includes treatments, testing, and nutrition. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000HCMN8I | | ASIN | B000HCMN8I | | Allergen Information | Apple Free | | Best Sellers Rank | #289 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1 in Water Garden & Pond Treatment | | Brand Name | API | | Customer Reviews | 4.3 4.3 out of 5 stars (20,946) | | Date First Available | June 8, 2005 | | Department | Home | | Global Trade Identification Number | 00317163031698 | | Is Discontinued By Manufacturer | No | | Item Form | Liquid | | Item Type Name | Pond build up & green water waste Remover | | Item Weight | 8.25 Pounds | | Item model number | 169C | | Liquid Volume | 1 Gallons | | Manufacturer | Mars Fishcare | | Manufacturer | Mars Fishcare | | Manufacturer Part Number | 169C | | Model Number | 169C | | Product Dimensions | 6 x 6 x 12 inches; 8.25 Pounds | | Target Species | Fish and Plants | | UPC | 317163031698 617163031699 | | Unit Count | 1 Fluid Ounces | ## Product Details - **Brand:** API - **Item Form:** Liquid - **Item Weight:** 8.25 Pounds - **Liquid Volume:** 1 Gallons - **Manufacturer:** Mars Fishcare ## Images ![API POND ALGAEFIX (1 gallon) Pond Algae Control - Copper Free - Clean, Clear Water - Up to 38400 Gallons - Safe for Fish, Plants - Water Gardens, Fountains - Natural Active Ingredient - EPA-Registered - Image 1](https://m.media-amazon.com/images/I/71PxV+It-pL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great Product! *by K***N on April 8, 2026* Great product, cleared my pound of an insane amount of hair algae in 3 days. Water lilies and fish show no signs of stress. ### ⭐⭐⭐⭐⭐ This DOES remove ALGEA without affecting the wildlife - I'm very impressed. *by D***E on November 8, 2016* This stuff is fantastic. I have a 7,000 gallon koi pond with 22 koi ranging from 12" to 30" in length. Average is 20". I'm a heavy feeder, I also feed twice per day. The pond is in full sunlight and circulates 8,000 gallons per hour via a 100' long 3' wide river with a 3' wide waterfall. What does all that mean. It means the water get's plenty of oxygen and sunlight and therefore grows green algae by the ton! The normal water color for the past 7 years has been pea green! I have lots of filtration, a huge UV filter and I've used hundreds of dollars of good bacteria. NOTHING kept the algae out for the past 7 years. ----> this year I decided to try a chemical to clear the water or get rid of the pond. I read everything I could find and decided this was the best chemical “experiment”: " poly oxyethylene(dimethyliminio)ethylene(dimethyliminio)ethylene dichloride ". This chemical is packaged under several different names and a concentrated version can be purchased at swimming pool suppliers. (concentrated is 20%, much thicker, more like syrup) The chemical kills algae AND causes it to clump and float to the surface as foam. It will clog your pond filter in a blink because of the clumped foam dead algae. Be prepared to clean the filter often. The chemical is "consumed" as it kills algae and my water was so green I added 7 times the dosage over a period of 3 weeks. The color tuned from pea green to a gray green slowly. I had to clean the filter every couple of days for about a month. ===>>> the water is now crystal clear. I now add about 3 ounces every 2 weeks and the water stays crystal clear. Every time I add there's a little foam on the surface, the filter clogs up within 48 hours, I clean it about 60%, not 100%, and I'm good for another 2 weeks. I'm very pleased with the results, ===>> How did the fish and plants do? It never phased them one bit. Not one bit. They didn't come up gulping for oxygen, it didn't faze any of the many frogs or billions of snails that inhabit the river, NONE of the lilies or water lettuce or other plants were affected in any way. I don’t have any experience with other fish other than koi. This is the chemical, sold under several different names: " poly oxyethylene(dimethyliminio)ethylene(dimethyliminio)ethylene dichloride " The dosage will vary by vendor depending on the concentration. The 3oz per 7000 gallons every two weeks I use is a 20% concentration I purchased at a swimming pool supply store sold under a different brand name. I have tried three different brands of this chemical (including this one) and they all work exactly the same. The only difference is the dosage which varies based on the concentration, ranging from 4% to 20%. Attached, 2 pictures, before and 45 days later, after. ### ⭐⭐⭐⭐ Great stuff; works well with no adverse effects *by T***M on July 18, 2025* Works better than any other product I've tried to control various forms of algae in a 3000 gallon pond. Water gets and stays clearer than I've seen it previously when using other algae control products. I don't have any fish to be concerned about but it hasn't harmed any of the water lilies or other pond plants. Only downside is for me it can be a bit expensive if I use as much as the directions say every week, so I'll often stretch out the applications to a lesser frequent schedule and I've found a frequency that works well for my situation. ## Frequently Bought Together - API POND ALGAEFIX Algae Control 1-Gallon Bottle - API POND-ZYME SLUDGE DESTROYER Pond Cleaner With Natural Pond Bacteria And Barley, 1-Pound Container - API POND ACCU-CLEAR Pond Water Clarifier 1-Gallon 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.us/products/3569797-api-pond-algaefix-1-gallon-pond-algae-control-copper-free](https://www.desertcart.us/products/3569797-api-pond-algaefix-1-gallon-pond-algae-control-copper-free) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-04-23*