--- product_id: 253376981 title: "Api Stress Zyme, 16 Oz, Multicolor" brand: "api" price: "€ 58.70" currency: EUR in_stock: true reviews_count: 10 category: "Api" url: https://www.desertcart.at/products/253376981-api-stress-zyme-16-oz-multicolor store_origin: AT region: Austria --- # Supports beneficial bacteria growth 473 ml liquid formula Reduces sludge & debris Api Stress Zyme, 16 Oz, Multicolor **Brand:** api **Price:** € 58.70 **Availability:** ✅ In Stock ## Summary > 🐟 Keep your underwater world thriving—because your fish deserve the best! ## Quick Answers - **What is this?** Api Stress Zyme, 16 Oz, Multicolor by api - **How much does it cost?** € 58.70 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/253376981-api-stress-zyme-16-oz-multicolor) ## 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 - • **Sludge Slayer:** Consumes sludge to keep gravel and decorations spotless without extra effort. - • **Bacteria Boost:** Supercharges beneficial bacteria to naturally balance your tank’s ecosystem. - • **Trusted Legacy:** From API, a 60-year leader in premium aquarium health solutions. - • **Proactive Aquarium Care:** Maintain crystal-clear water and vibrant fish with weekly use. - • **Universal Compatibility:** Perfect for both freshwater and saltwater aquariums—one solution for all tanks. ## Overview API Stress Zyme is a 473 ml liquid treatment designed to maintain healthy freshwater and saltwater aquariums by boosting beneficial bacteria and reducing sludge buildup. Recommended for weekly use, it helps keep gravel and decorations clean, supports vibrant fish health, and reduces maintenance efforts. Trusted by over 10,000 users with a 4.8-star rating, this BPA-free formula is a staple for proactive aquarium care from a brand with nearly six decades of expertise. ## Description Api Stress Zyme, 16 Oz, Multicolor : desertcart.ae: Pet Supplies Review: Great product - A great product from API. It helps to create the beneficial bacteria in no time. Review: Suggest - I love the brand ## Features - 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 | | Allergen Information | BPA-Free | | Best Sellers Rank | #10,142 in Pet Supplies ( See Top 100 in Pet Supplies ) #60 in Fish Medication & Health Supplies | | Brand | API | | Brand Name | API | | Customer Reviews | 4.7 out of 5 stars 11,081 Reviews | | Global Trade Identification Number | 00317163160565 | | Item Form | Liquid | | Item Type Name | API Stress Zyme, 16 OZ | | Item Weight | 544.31 Grams | | Item form | Liquid | | Item weight | 544.31 Grams | | Liquid Volume | 473 Milliliters | | Liquid volume | 473 Milliliters | | Manufacturer | Aquarium Pharmaceuticals | | Manufacturer Part Number | 56E | | Model Number | 56E | | Number of Items | 1 | | Number of Packs | 1 | | Pet Type | Fish | | Target Species | Fish | | UPC | 317163160565 | | Unit Count | 1 Count | | Unit count | 1 Count | ## Product Details - **Brand:** API - **Item form:** Liquid - **Item weight:** 544.31 Grams - **Liquid volume:** 473 Milliliters - **Number of Packs:** 1 ## Images ![Api Stress Zyme, 16 Oz, Multicolor - Image 1](https://m.media-amazon.com/images/I/71NW462aaAL.jpg) ![Api Stress Zyme, 16 Oz, Multicolor - Image 2](https://m.media-amazon.com/images/I/81hy3yOKocL.jpg) ![Api Stress Zyme, 16 Oz, Multicolor - Image 3](https://m.media-amazon.com/images/I/91Wlg1zGY2L.jpg) ![Api Stress Zyme, 16 Oz, Multicolor - Image 4](https://m.media-amazon.com/images/I/91M80WNPvvL.jpg) ![Api Stress Zyme, 16 Oz, Multicolor - Image 5](https://m.media-amazon.com/images/I/91rbAhq0W4L.jpg) ## Available Options This product comes in different **Size, Style** 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. 👍 ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product *by H***M on 17 July 2022* A great product from API. It helps to create the beneficial bacteria in no time. ### ⭐⭐⭐⭐⭐ Suggest *by S***A on 2 August 2023* I love the brand ### ⭐⭐⭐⭐⭐ ممتاز عن البكتريا *by U***I on 14 July 2023* ممتاز ## 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? - 🛒 **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/253376981-api-stress-zyme-16-oz-multicolor](https://www.desertcart.at/products/253376981-api-stress-zyme-16-oz-multicolor) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-09-01*