--- product_id: 34542656 title: "GRECH CBG-500 5W UV Hang On Back Aquarium Filter – 132 GPH HOB Power Filter for 10-30 Gallon Fish Tanks, External Filter with UV Water Clarifier" brand: "grech" price: "S$91" currency: SGD in_stock: true reviews_count: 8 category: "Grech" url: https://www.desertcart.sg/products/34542656-grech-cbg-500-5w-uv-hang-on-back-aquarium-filter store_origin: SG region: Singapore --- # 132 GPH adjustable flow 5W UV sterilizer clarity Bio + mechanical filtration GRECH CBG-500 5W UV Hang On Back Aquarium Filter – 132 GPH HOB Power Filter for 10-30 Gallon Fish Tanks, External Filter with UV Water Clarifier **Brand:** grech **Price:** S$91 **Availability:** ✅ In Stock ## Summary > 🐠 Elevate your aquarium game with clarity and control! ## Quick Answers - **What is this?** GRECH CBG-500 5W UV Hang On Back Aquarium Filter – 132 GPH HOB Power Filter for 10-30 Gallon Fish Tanks, External Filter with UV Water Clarifier by grech - **How much does it cost?** S$91 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/34542656-grech-cbg-500-5w-uv-hang-on-back-aquarium-filter) ## Best For - grech enthusiasts ## Why This Product - Trusted grech brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Power Outage Proof:** Self-priming design restarts automatically after outages—no burnouts - • **Surface Skimmer Magic:** Removes surface films to keep your aquarium sparkling clean - • **Tailored Flow Control:** Adjustable 132 GPH lets you customize filtration speed effortlessly - • **Crystal Clear Water, Fast:** 5W UV sterilizer zaps algae & bacteria for pristine tanks - • **Versatile Media Compatibility:** Use your own bio media or carbon for personalized filtration power ## Overview The GRECH CBG-500 is a compact, hang-on-back aquarium filter designed for 10-30 gallon tanks, delivering an adjustable 132 GPH flow rate combined with biological and mechanical filtration. Featuring a built-in 5W UV sterilizer, it effectively eliminates algae and harmful microorganisms, ensuring crystal-clear water. Its surface skimmer removes unwanted surface films, while the self-priming function guarantees reliable operation even after power interruptions. Compatible with various filter media, this quiet, easy-to-install unit is perfect for freshwater and saltwater setups seeking professional-grade water clarity. ## Description The Grech CBG-Series Hang-On Back UV Filter offers a versatile and convenient filtration solution for freshwater and saltwater aquariums. Designed in a user-friendly “Hang-On Back” style, it provides easy installation, quiet operation, and adjustable water flow to suit your tank’s needs. The CBG-Series combines mechanical and biological filtration with included activated carbon and bio media for efficient water clarification. Its integrated 5W UV clarifier can be turned on or off to support clear, bright water. The adjustable surface skimmer helps reduce surface buildup, keeping your aquarium looking clean and well-maintained. Ideal for home aquariums, tropical fish tanks, and planted setups. Review: Amazing HOB filter at this price! - The UV feature is amazing when setting up a new tank or if you get an algae bloom. I set up a 10 gallon tank for some guppies and platies and within a week the water clouded up due to an algae bloom (typical for a new tank). I turned on the UV light and within days it was crystal clear. Once it cleared up, I turned off the UV lamp and the water has stayed perfect. I also like the filter design. You don't need to purchase expensive same-brand cassettes/filters or anything. You can use your own media and build up the filter however you like. I'm using ceramic bio rings, crushed coral in a mesh bag, and the foam that came with it. The water is crystal clear and all water parameters are exactly where I want them. Lastly, but not the least important thing I love about this filter is that it re-primes itself after a power outage! I have tried several other small HOBs that couldn't and they burned themselves out due to lack of water at the impeller. As long as this filter stays in the tank and water levels are where they should be, it has restarted EVERY SINGLE TIME we've had a power outage. One outage was 4 hours long and this was humming along when I got home. Other notables: - it's quiet - easy to set up - easy to clean - flow is adjustable - it has a surface skimmer that is adjustable and works great Review: Photos say everything! This thing is incredible. - Been looking for a while for a UV solution that would work for a small 10g tank. Everything else I found was standalone bulbs that would go in a canister or inline system which didn’t make too much sense for something this small. Filter is quiet enough, great flow rate and the surface skimmer is a nice addition. Super easy setup and worked great right out of the box. Cleared the water up completely within a couple days with no water changes. Love how the filter media is setup as well. Very easy to swap/clean media without having to pull everything out. ## Features - Adjustable 132gph Filter Flow Rate with Surface Skimmer to eliminate undesired surface films - Features a 5W UV Sterilizer. Keeping aquarium water crystal clear - Suitable Aquarium Tank Size: 10 to 30 Gallons - Dimension: 7.6 x 4.4 x 6.5in (192 x 110.5 x 165mm) - Biological and mechanical filtration. Box includes active carbon and bio media ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.1 out of 5 stars 348 Reviews | ## Images ![GRECH CBG-500 5W UV Hang On Back Aquarium Filter – 132 GPH HOB Power Filter for 10-30 Gallon Fish Tanks, External Filter with UV Water Clarifier - Image 1](https://m.media-amazon.com/images/I/612Xq+O6KoL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: will i have to buy the sponge, and media separately?** A: You don't have to buy the sponge and media. It comes with the pump. But, you'll have to replace them eventually. The sponge can be washed and reused. **Q: Where can I buy the UV light to replace (spec. says it lasts 10,000 hours)?** A: It is a 5W G23 UVGI Bulb. You can find them on Amazon or e-bay. **Q: What are the dimensions of the filter baskets?** A: Roughly 3.5"w, 2"d, 2"h.......Obviously Bio media isn't an issue, and any carbon media bag works for the center basket, but the trick is the sponge. I buy fluval 30 size media sponges, cut them in half and turn them sideways and they fit perfect. Somewhat of a pain, but depending on the quantity of fish in your tank, you shouldn't need to replace your sponge but once every few months. And rinse it out about every 20 days or so **Q: where are the part numbers for the replaceable filters and UV** A: I can tell you the part number which is WTCUH5L. Made by Grech , it’s a 5 watt UV light. So far I have been unsuccessful finding a US source and or equivalent. I’m still looking just in case. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Amazing HOB filter at this price! *by M***H on October 27, 2024* The UV feature is amazing when setting up a new tank or if you get an algae bloom. I set up a 10 gallon tank for some guppies and platies and within a week the water clouded up due to an algae bloom (typical for a new tank). I turned on the UV light and within days it was crystal clear. Once it cleared up, I turned off the UV lamp and the water has stayed perfect. I also like the filter design. You don't need to purchase expensive same-brand cassettes/filters or anything. You can use your own media and build up the filter however you like. I'm using ceramic bio rings, crushed coral in a mesh bag, and the foam that came with it. The water is crystal clear and all water parameters are exactly where I want them. Lastly, but not the least important thing I love about this filter is that it re-primes itself after a power outage! I have tried several other small HOBs that couldn't and they burned themselves out due to lack of water at the impeller. As long as this filter stays in the tank and water levels are where they should be, it has restarted EVERY SINGLE TIME we've had a power outage. One outage was 4 hours long and this was humming along when I got home. Other notables: - it's quiet - easy to set up - easy to clean - flow is adjustable - it has a surface skimmer that is adjustable and works great ### ⭐⭐⭐⭐⭐ Photos say everything! This thing is incredible. *by A***R on December 1, 2024* Been looking for a while for a UV solution that would work for a small 10g tank. Everything else I found was standalone bulbs that would go in a canister or inline system which didn’t make too much sense for something this small. Filter is quiet enough, great flow rate and the surface skimmer is a nice addition. Super easy setup and worked great right out of the box. Cleared the water up completely within a couple days with no water changes. Love how the filter media is setup as well. Very easy to swap/clean media without having to pull everything out. ### ⭐⭐⭐⭐ Works great but beware if you have tiny snails… *by A***R on March 22, 2026* I like this filter and I’ve had it for about 2.5 years now. It’s the perfect size, filters well, and keeps water crystal clear due to the UV bulb inside. The main problem I have with it is it randomly getting things stuck in it in the middle of the night and making a loud grinding noise which wakes me up. That’s fun. I think most of the time it’s tiny ramshorn snails getting stuck in the impeller area. I do think sometimes small leaves from live plants cause noise problems too when they get stuck. Every few months, I have to take apart the filter (fairly user friendly, everything just snaps into place, no screws) and remove snail shells and dead snail goo from the impeller area to restore the strong flow of the filter and stop it from making noise. So if you have a pretty bad snail infestation consider eradicating the snails before getting this filter. ## Frequently Bought Together - Grech CBG-500 5W UV Sterilizer Hang-On Back Filter, 10-30 gallon/132 GPH - AquaClear 50 Foam Filter Inserts, Aquarium Filter Replacement Media, 3 Count (Pack of 1), A1394 - Grech CBG-800 5W UV Sterilizer Hang-On Back Filter, 20-50 gallon/211 GPH, Black --- ## 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.sg/products/34542656-grech-cbg-500-5w-uv-hang-on-back-aquarium-filter](https://www.desertcart.sg/products/34542656-grech-cbg-500-5w-uv-hang-on-back-aquarium-filter) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-07-04*