--- product_id: 54642492 title: "Starter bacteria aquarium 236 ml – safe start for medium tanks & fish stocking – supports biological filtration & stable water – reduces ammonia & nitrite naturally – ARKA Nite-Out II" brand: "arka" price: "98 zł" currency: PLN in_stock: true reviews_count: 13 category: "Arka" url: https://www.desertcart.pl/products/54642492-starter-bacteria-aquarium-236-ml-safe-start-for-medium-tanks store_origin: PL region: Poland --- # 236 ml potent bacteria culture Reduces nitrites in under 30 hours Supports natural ammonia & nitrite conversion Starter bacteria aquarium 236 ml – safe start for medium tanks & fish stocking – supports biological filtration & stable water – reduces ammonia & nitrite naturally – ARKA Nite-Out II **Brand:** arka **Price:** 98 zł **Availability:** ✅ In Stock ## Summary > 🦠 Transform your tank’s health overnight — because your fish deserve the best! ## Quick Answers - **What is this?** Starter bacteria aquarium 236 ml – safe start for medium tanks & fish stocking – supports biological filtration & stable water – reduces ammonia & nitrite naturally – ARKA Nite-Out II by arka - **How much does it cost?** 98 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/54642492-starter-bacteria-aquarium-236-ml-safe-start-for-medium-tanks) ## Best For - arka enthusiasts ## Why This Product - Trusted arka brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rapid Toxin Reduction:** Watch ammonia and nitrite levels plummet in less than 30 hours—stress-free fish stocking. - • **Effortless Application:** Just pour 10 ml per 100 L—no complicated setups, no guesswork. - • **Trusted Aquascaper Quality:** Professional-grade biotech ensuring stable, healthy water conditions every time. - • **Instant Biological Filtration:** Kickstart your tank’s ecosystem from day one with premium ARKA bacteria. - • **Universal Aquarium Compatibility:** Perfectly balanced for freshwater, marine, and shrimp tanks alike. ## Overview The ARKA Nite-Out II Starter Bacteria Aquarium 236 ml is a premium biotechnology solution designed to establish stable biological filtration immediately in medium-sized tanks. It naturally converts harmful ammonia and nitrites, reducing toxic buildup within 30 hours, and supports healthy water conditions for freshwater, marine, and shrimp aquariums. Trusted by professionals, it simplifies tank cycling and ensures safer, faster fish stocking. ## Description Free delivery and returns on eligible orders. Buy Starter bacteria aquarium 236 ml – safe start for medium tanks & fish stocking – supports biological filtration & stable water – reduces ammonia & nitrite naturally – ARKA Nite-Out II at desertcart UK. Review: Better than almost all mainstream alternatives - I have tried other bottled 'bacteria' from Seachem, Tetra, API and this one is superior in results. Compared to other alternatives on the market, I think it has cultures of the right bacteria (Nitrosomonas, Nitrospira and Nitrobacter) compared to other market alternatives that usually have heterotrophs or anaerobes. In my case, it dropped nitrites to near zero in under 30 hours. PROS: - Works under 24 hours in emergencies - No bloom/cloudy water CONS: - More expensive than others - Opened bottle needs to be put in your fridge Review: My fish are thankful! - Honestly, I wasn’t expecting much, but this little bottle of bacteria wizardry saved me a ton of stress. Set up a new tank, tossed this in, and bam—ammonia and nitrites started dropping like they owed me money. I added a couple of tough little fish and kept an eye on the water parameters, and everything stayed surprisingly chill. It’s like the bacteria knew exactly what to do—no training required. Super easy to use: shake it up, dump it in, and feel like a responsible aquarium parent. I’ll definitely be grabbing another bottle for the next tank I “accidentally” set up. ## Features - Safe aquarium start: Creates stable biological filtration from day one – shortens tank cycling and ensures safe fish introduction sooner. - Natural water balance: Converts ammonia and nitrite biologically – ideal after water changes or filter cleaning – prevents toxic build-up. - Reliable performance: Maintains healthy water conditions and supports beneficial bacteria growth in medium aquariums. - Simple application: Pour directly into the tank – 10 ml per 100 l – suitable for freshwater, marine and shrimp setups - ARKA quality: Premium biotechnology for safe aquarium care – trusted by professionals and aquascapers. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B005A3XA4A | | Allergen Information | Allergen-Free | | Batteries Included | No | | Batteries required | No | | Best Sellers Rank | 2,969 in Pet Supplies ( See Top 100 in Pet Supplies ) 31 in Aquarium Water Treatments | | Colour | multicolored | | Customer Reviews | 4.7 4.7 out of 5 stars (2,309) | | Date First Available | 15 Sept. 2012 | | EU Energy Efficiency Label | A | | Item Form | Liquid | | Item Weight | 280 g | | Item model number | NITEH08US | | Number of Items | 1 | | Pet Life Stage | Adult | | Pet Type | Fish | | Product Dimensions | 5 x 5 x 18.5 cm; 280 g | | Quantity | 1 | | Size | 8oz (236ml) | | Specific Uses | Active | | Volume | 236 | ## Product Details - **Brand:** ARKA - **Item form:** Liquid - **Item weight:** 0.28 Kilograms - **Liquid volume:** 236 Millilitres - **Manufacturer:** MICROBE-LIFT ## Images ![Starter bacteria aquarium 236 ml – safe start for medium tanks & fish stocking – supports biological filtration & stable water – reduces ammonia & nitrite naturally – ARKA Nite-Out II - Image 1](https://m.media-amazon.com/images/I/71lBiH9NnZL.jpg) ## Questions & Answers **Q: Hi, can this work to prevent fungus gnats and mosquitoes in soil and water? I know similar products can.** A: I couldn't tell you I'm afraid. I only used it when I needed to accelerate the cycle for the aquarium...which it does if you use enough of it. If you are cycling an aqaurium if its 100 litres plus buy a big bottle as it will save you in the end **Q: How much of this product would i put in a 350ltr tank ?** A: I am not sure so I put 5 mls in a 50 litre tank Shane instructions are in German **Q: Can be used in pond with koi fish ?** A: Theoretically yes, I use in an aquarium. Personally would check with Maidenhead Aquatics or ARKA for a definitive answer. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Better than almost all mainstream alternatives *by I***I on 30 July 2025* I have tried other bottled 'bacteria' from Seachem, Tetra, API and this one is superior in results. Compared to other alternatives on the market, I think it has cultures of the right bacteria (Nitrosomonas, Nitrospira and Nitrobacter) compared to other market alternatives that usually have heterotrophs or anaerobes. In my case, it dropped nitrites to near zero in under 30 hours. PROS: - Works under 24 hours in emergencies - No bloom/cloudy water CONS: - More expensive than others - Opened bottle needs to be put in your fridge ### ⭐⭐⭐⭐⭐ My fish are thankful! *by R***N on 18 April 2025* Honestly, I wasn’t expecting much, but this little bottle of bacteria wizardry saved me a ton of stress. Set up a new tank, tossed this in, and bam—ammonia and nitrites started dropping like they owed me money. I added a couple of tough little fish and kept an eye on the water parameters, and everything stayed surprisingly chill. It’s like the bacteria knew exactly what to do—no training required. Super easy to use: shake it up, dump it in, and feel like a responsible aquarium parent. I’ll definitely be grabbing another bottle for the next tank I “accidentally” set up. ### ⭐⭐⭐⭐⭐ Ok *by S***E on 19 December 2025* Seems ok but i aint no fish just very sore and awkward to pour so emptied it into an old stability 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.pl/products/54642492-starter-bacteria-aquarium-236-ml-safe-start-for-medium-tanks](https://www.desertcart.pl/products/54642492-starter-bacteria-aquarium-236-ml-safe-start-for-medium-tanks) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-26*