--- product_id: 1780629 title: "API STRESS ZYME Freshwater and Saltwater Aquarium Cleaning Solution 16-Ounce Bottle" brand: "api" price: "€ 91.00" currency: EUR in_stock: true reviews_count: 13 category: "Api" url: https://www.desertcart.be/products/1780629-api-stress-zyme-freshwater-and-saltwater-aquarium-cleaning-solution-16 store_origin: BE region: Belgium --- # Fresh & saltwater safe 300M+ live bacteria per tsp Natural sludge consumption API STRESS ZYME Freshwater and Saltwater Aquarium Cleaning Solution 16-Ounce Bottle **Brand:** api **Price:** € 91.00 **Availability:** βœ… In Stock ## Summary > πŸ§ͺ Transform your tank into a crystal-clear aquatic haven effortlessly! ## Quick Answers - **What is this?** API STRESS ZYME Freshwater and Saltwater Aquarium Cleaning Solution 16-Ounce Bottle by api - **How much does it cost?** € 91.00 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/1780629-api-stress-zyme-freshwater-and-saltwater-aquarium-cleaning-solution-16) ## 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€’ **Effortless Weekly Care:** Simple weekly dosing reduces maintenance time while promoting a balanced, healthy aquatic environment. - β€’ **Trusted Legacy Formula:** Backed by nearly 60 years of API expertise, delivering proven, reliable aquarium health solutions. - β€’ **Powerful Bioclean Boost:** Over 300 million live bacteria actively consume sludge and organic waste, keeping your aquarium pristine. - β€’ **Dual Habitat Compatibility:** Formulated for both freshwater and saltwater tanks, ensuring versatile, all-in-one maintenance. - β€’ **Enhanced Gravel & Decoration Cleanliness:** Naturally breaks down debris on gravel and decorations, preserving your tank’s aesthetic appeal. ## Overview API STRESS ZYME is a 16-ounce liquid aquarium cleaning solution containing over 300 million live bacteria per teaspoon that naturally consumes sludge and organic debris. Safe for both freshwater and saltwater tanks, it reduces maintenance by enhancing the biological filter and keeping gravel and decorations clean. Trusted for nearly six decades, this weekly-use formula supports a healthy, balanced aquatic environment for all fish species. ## Description Reduce aquarium maintenance by creating a naturally balanced aquarium with API STRESS ZYME Freshwater and Saltwater Aquarium Cleaning Solution. Fish waste, sludge, uneaten food and other organic compounds can cause harmful water conditions including ammonia and nitrite poisoning and breathing difficulty. They can also be difficult and time-consuming to remove especially from rock, coral and gravel. API STRESS ZYME Freshwater and Saltwater Aquarium Cleaning Solution contains over 300 million live bacteria per teaspoonful to consume sludge and organic debris, keeping gravel and glass clean naturally and boosting the natural aquarium cycle, reducing aquarium maintenance over time. Use it weekly in freshwater and saltwater aquariums to maintain a strong biological filter and a healthy, clean aquarium. 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. Review: Great product - Works great! Simple directions and great value for the price. Review: 10/10 - Works really well with my tank keeping the water clear and helping reduce sludge on the filters which helps maintenance and keeping it running longer ## Features - Contains one (1) API STRESS ZYME Freshwater and Saltwater Aquarium Cleaning Solution 16-Ounce Bottle - Keeps freshwater and saltwater aquariums clean and reduces maintenance - Consumes sludge to help keep gravel and decorations clean - Adds beneficial bacteria for a healthy aquarium - Use weekly to maintain a clean, healthy aquarium ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000255N3W | | ASIN | B000255N3W | | Allergen Information | Apple Free | | Best Sellers Rank | #3,629 in Pet Supplies ( See Top 100 in Pet Supplies ) #18 in Aquarium Water Treatments | | Brand Name | API | | Customer Reviews | 4.8 4.8 out of 5 stars (12,079) | | Date First Available | June 20, 2004 | | Department | Unisex-Adult | | Global Trade Identification Number | 00317163160565 | | Is Discontinued By Manufacturer | Yes | | Item Form | Liquid | | Item Type Name | Aquarium Sludge Remover | | Item Weight | 544.31 Grams | | Item model number | 56E | | Liquid Volume | 473 Milliliters | | Manufacturer | Mars Fishcare | | Manufacturer | Mars Fishcare | | Manufacturer Part Number | 56E | | Model Number | 56E | | Product Dimensions | 10 x 10 x 10 inches; 1.2 Pounds | | Target Species | Fish | | UPC | 317163160565 | | Unit Count | 1 Count | ## Product Details - **Brand:** API - **Item Form:** Liquid - **Item Weight:** 544.31 Grams - **Liquid Volume:** 473 Milliliters - **Manufacturer:** Mars Fishcare ## Images ![API STRESS ZYME Freshwater and Saltwater Aquarium Cleaning Solution 16-Ounce Bottle - Image 1](https://m.media-amazon.com/images/I/71NW462aaAL.jpg) ![API STRESS ZYME Freshwater and Saltwater Aquarium Cleaning Solution 16-Ounce Bottle - Image 2](https://m.media-amazon.com/images/I/81hy3yOKocL.jpg) ![API STRESS ZYME Freshwater and Saltwater Aquarium Cleaning Solution 16-Ounce Bottle - Image 3](https://m.media-amazon.com/images/I/91Wlg1zGY2L.jpg) ![API STRESS ZYME Freshwater and Saltwater Aquarium Cleaning Solution 16-Ounce Bottle - Image 4](https://m.media-amazon.com/images/I/91M80WNPvvL.jpg) ![API STRESS ZYME Freshwater and Saltwater Aquarium Cleaning Solution 16-Ounce Bottle - Image 5](https://m.media-amazon.com/images/I/91rbAhq0W4L.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Can I mix this with API Quick Start and API Stress Coat+ in a gallon every time I do water changes weekly? Or just pour it directly in my 5.5 tank?** A: In short, you don't need the Stress Zyme if you already are using the Quick Start. Here's a longer answer:The API Stress Coat is primarily a de-chlorinator and has aloe added to help maintain a healthy slime coat on the fish so this should always be added to the water and mixed before adding to the tank. The API Quick Start is meant to jump start the biological cycling of a tank and is only needed for new tanks or potentially semi established tanks that have a spike in ammonia and nitrite levels which could be caused by adding more fish. You can stop using this once your water chemistry has stabilized. API Stress Zyme is very similar in function to the Quick Start and is generally chosen to improve water clarity or stabilize chemistry in more established tanks. You don't need to use both simultaneously and would probably never see the difference compared to using just one. On another note, I always add my bacteria after there is no chance there is any chlorine so they have a better chance of proliferating. I would add either the Quick Start or the Stress Zyme the day after a water change, directly into the tank. **Q: can i mix stress coat, stress zyme and tap water conditioner? if so what amount of each should i mix? doing this harm my fishes?** A: Stress Coat and water conditioner is the same. ( stress Coat is water conditioner ). if you use both at the same time that you double it up. Maybe it is nothing will happening . But, it is not necessary to do that. **Q: How long this product can be stored before it expires? Also, would its effectiveness reduce during long time storage?** A: As for length of time you can store, I use it weekly and it lasts for about four months or so. Does not seem to lose effectiveness in that time. **Q: What is the expiration date on this Stress Zyme? It seems very inexpensive.** A: There is an expiration date on the bottle, however, these are live bacteria and once the bottle is open the shelf life is cut in half. Same as Seachems Pristine. Buy the size bottle for your tank. There is 250ml and 500 or 750ml, depending on the brand. My personal and professional advice is buy the smaller one 1st and see how much you go through, follow the instructions completely. They work well, keeps the glass cleaner longer. Also very important, make sure the aeriation is adequate and they say to change the filters 1st. If you have the $$ go for it. Best and least expensive and just as sufficient, is to change them half way before you normally change out your filters. API Stress zyme seems to keep its life span quite a while after opening. But trust me, you'll use it up way before it expires. Compared to the other similar products, this one seems to leave more of a brownish pile on the corners or underneath Ornaments, whis in turn will have to be vacuumed, netted or a baster for cooking depending on the size of your tank. πŸ‘ ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product *by K***R on February 27, 2026* Works great! Simple directions and great value for the price. ### ⭐⭐⭐⭐⭐ 10/10 *by S***R on February 5, 2026* Works really well with my tank keeping the water clear and helping reduce sludge on the filters which helps maintenance and keeping it running longer ### ⭐⭐⭐⭐⭐ Highly Recommend *by M***S on April 1, 2026* Excellent Product..Thanks ## Frequently Bought Together - API STRESS ZYME Freshwater and Saltwater Aquarium Cleaning Solution 16-Ounce Bottle - 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? - 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://www.desertcart.be/products/1780629-api-stress-zyme-freshwater-and-saltwater-aquarium-cleaning-solution-16](https://www.desertcart.be/products/1780629-api-stress-zyme-freshwater-and-saltwater-aquarium-cleaning-solution-16) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-04-22*