--- product_id: 339496216 title: "Mini GKM3W" brand: "aa" price: "437 zł" currency: PLN in_stock: true reviews_count: 13 category: "Aa" url: https://www.desertcart.pl/products/339496216-mini-gkm3w store_origin: PL region: Poland --- # 50 GPH Flow Rate 20 Gallon Capacity No Tools Required Mini GKM3W **Brand:** aa **Price:** 437 zł **Availability:** ✅ In Stock ## Summary > 🌊 Dive into Clarity with the GKM3W Mini UV! ## Quick Answers - **What is this?** Mini GKM3W by aa - **How much does it cost?** 437 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/339496216-mini-gkm3w) ## Best For - aa enthusiasts ## Why This Product - Trusted aa brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Submersible Design:** Sealed UV bulb ensures durability and efficiency. - • **Crystal Clear Waters:** Transform your aquarium into a pristine aquatic paradise. - • **Effortless Installation:** No tools needed—just attach and enjoy! - • **Long-lasting Performance:** UV bulbs last 6-9 months for continuous clarity. - • **Smart Replacement Alerts:** LED signals for timely UV bulb changes. ## Overview The AAGKM3W Mini Internal UV is designed for aquariums up to 20 gallons, featuring a powerful 50 GPH pump flow rate. Its submersible design and sealed UV bulb ensure efficient water purification while requiring no tools for installation. With LED indicators for bulb replacement and a lifespan of 6 to 9 months, this device keeps your aquarium crystal clear and reduces the need for frequent water changes. ## Description GKM3W mini Internal UV with Power Head. Keep Your Aquarium Crystal Clear. Reduce water changes. Installation without any tools. Perfect for aquariums for up to 20Ga. Spare bulb and replacement sponge available. Lamp contains Mercury. Manage in Accordance with State Disposal Laws. Review: Rather purple but very well made. - Ended up returning mine to get another color. But the product is top notch and I'd recommend it for anyone wanting color in their case. As for the UV it's a bit dim and puts out a lot of purple light which I'm told is normal. I asked about using lower band UV but everyone in the forums seemed to think I was wanting to hook it up to a 2000w supply and cook the house or something. So my search for low power emitters that will actually fluoresce my loop but not fill the case with purple continues (black case, red lights btw so purple is right out). But the product is made well and has handy magnets. Hooks right up and worked like a champ. Nothing but positive things to say about it. Review: Works perfect!! - Worked so much better than I expected! My tank was green no matter what did. Installed this up light filter and let it run with the light on 24 hours a day and within five days it was crystal clear. ## Features - GKM3W mini Internal UV with Power Head. For aquariums up to 20 gallons. - The GKM3W allows water flow in direct contact with the UV lamp, making it extremely efficient. Keep your aquarium crystal clear & reduce water changes. - No tools required. Simply attached to the inside of the aquarium with the included suction cups. Submersible design for the sealed UV Bulb and pump. - 2.5" x 2.5" x 7.5" long. LED signals need for a UV Bulb replacement, easy change without tools. UV bulbs lasts for 6 to 9 months, assuming constant use. Sealed UV bulb design - avoid UV housing deteriorate, fresh with every bulb change. - Pump Flow Rate: 50 GPH. UL listed. EPA Est # 093568. - Included components: Water pump, Sealed UV bulb. Comes with UL plug, only suitable for US market. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0957RMC33 | | Allergen Information | Allergen-Free | | Best Sellers Rank | #44,029 in Pet Supplies ( See Top 100 in Pet Supplies ) #162 in Aquarium Lights | | Brand | AA | | Brand Name | AA | | Customer Reviews | 4.3 out of 5 stars 362 Reviews | | Included Components | Water pump, Sealed UV bulb | | Item Form | Device | | Item Type Name | Aquarium UV | | Item Weight | 1.17 Pounds | | Liquid Volume | 80 Liters | | Manufacturer | AA Aquarium | | Manufacturer Part Number | AAUV3W | | Model Number | AAUV3W-B | | Target Species | Fish | | Unit Count | 1 Count | | Warranty Description | 1 year limited warranty except tear & wear part | ## Product Details - **Brand:** AA - **Liquid Volume:** 80 Liters - **Item Weight:** 1.17 Pounds - **Item Form:** Device - **Manufacturer:** AA Aquarium ## Images ![Mini GKM3W - Image 1](https://m.media-amazon.com/images/I/71feedGC4ZL.jpg) ![Mini GKM3W - Image 2](https://m.media-amazon.com/images/I/81VKyMwSLES.jpg) ![Mini GKM3W - Image 3](https://m.media-amazon.com/images/I/71HtuW12YtL.jpg) ![Mini GKM3W - Image 4](https://m.media-amazon.com/images/I/71HWwt2+AdS.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Rather purple but very well made. *by K***S on November 21, 2025* Ended up returning mine to get another color. But the product is top notch and I'd recommend it for anyone wanting color in their case. As for the UV it's a bit dim and puts out a lot of purple light which I'm told is normal. I asked about using lower band UV but everyone in the forums seemed to think I was wanting to hook it up to a 2000w supply and cook the house or something. So my search for low power emitters that will actually fluoresce my loop but not fill the case with purple continues (black case, red lights btw so purple is right out). But the product is made well and has handy magnets. Hooks right up and worked like a champ. Nothing but positive things to say about it. ### ⭐⭐⭐⭐⭐ Works perfect!! *by C***R on November 29, 2025* Worked so much better than I expected! My tank was green no matter what did. Installed this up light filter and let it run with the light on 24 hours a day and within five days it was crystal clear. ### ⭐⭐⭐⭐ Rather bulky but seems to work. *by T***N on November 15, 2022* I got this GKM for my 10 gallon long tank as well as the next size up (9W) for a larger tank. This 3W sterilizer is barely smaller than the 9 W. I’m actually debating whether I should just get the larger sterilizer even for my 10 gallon. Pros: 1) Adjustable flow 2) A bit shorter than the 9W version (though really not by much, depending on how you install it) . 3) VERY quiet. 4) Sponge filter insert seems like it could keep out baby shrimp (though I only just put shrimp in my tank a couple of days ago). You could always but a finer pored sponge, instead. The flow is so powerful that I doubt that it would cause a problem with the function to replace with the finer sponge (remember that SLOWER flow through the filter exposes the problem organisms longer to the UV light, resulting in better effectiveness). 5) This is practically “plug and play” in terms of ease of use. The greatest challenge may be finding enough depth in the tank to place it. It’s really convenient not to have to need a canister filter to use this, the way you need to with so many other models. 6) No risk of accidentally looking into the UV bulb, which could potentially blind you. This is no exaggeration — I know because I’m an eye doctor. Cons: 1) Bulky both vertically and in width. 2) You need TWO OUTLETS for this one device. I’m not sure why they didn’t just do the same thing as for the 9W GKM and have both cords connect to a box that then only uses one outlet. 🤷‍♀️ This is annoying and messy, not to mention using up outlets. 3) This may or may not be a level 2 UV sterilizer, meaning that it will kill free floating algal blooms, as the name claims, but it may or may not be powerful enough to neutralize (messing up DNA of) bacteria and probably does not kill parasites (such as ich). It’s not clear if these devices have even been tested for the later two purposes. 4) Considering that this may be barely above a level 1 UV sterilizer, it’s rather on the pricey side, especially since down the road you will have to replace the bulb and casing, which cost almost as much as the entire machine. 5) I get that you don’t have to worry about the casing degrading with UV exposure over time, since you have to replace that whole section at once, but I question how environmentally friendly this approach is. That being said, it is safer than having to handle the UV bulb. ## Frequently Bought Together - AA GKM3W Mini Internal UV,Black,AAUV3W-B - AA GKM9W Internal UV for Aquariums up to 50Ga,Black - Seachem Indoor Purigen Organic Filtration Resin - Fresh and Saltwater 100 ml --- ## 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/339496216-mini-gkm3w](https://www.desertcart.pl/products/339496216-mini-gkm3w) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-20*