---
product_id: 345218805
title: "AA GKM9W Internal UV for Aquariums up to 50Ga,Black"
brand: "aa"
price: "S$132"
currency: SGD
in_stock: true
reviews_count: 13
category: "Aa"
url: https://www.desertcart.sg/products/345218805-aa-gkm9w-internal-uv-for-aquariums-up-to-50ga-black
store_origin: SG
region: Singapore
---

# 9W UV lamp power 50 GPH pump flow rate 5-min tool-free install AA GKM9W Internal UV for Aquariums up to 50Ga,Black

**Brand:** aa
**Price:** S$132
**Availability:** ✅ In Stock

## Summary

> ✨ Keep your tank crystal clear and your aquatic friends thriving!

## Quick Answers

- **What is this?** AA GKM9W Internal UV for Aquariums up to 50Ga,Black by aa
- **How much does it cost?** S$132 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/345218805-aa-gkm9w-internal-uv-for-aquariums-up-to-50ga-black)

## 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

- • **Eco-Friendly & Safe:** UL listed, sealed bulb design prevents housing damage and protects your aquatic life.
- • **Smart UV Bulb Alerts:** LED signals when it’s time to replace the UV bulb, keeping maintenance hassle-free.
- • **Compact & Quiet Design:** Sleek 12x4x4 inch unit runs silently, blending seamlessly into your modern aquarium setup.
- • **Plug & Play in 5 Minutes:** No tools needed—get your aquarium sparkling clean almost instantly.
- • **Crystal Clear Water, Effortlessly:** Direct water contact with sealed UV lamp ensures maximum sterilization efficiency.

## Overview

The AA GKM9W Internal UV System is a compact, 9-watt UV sterilizer designed for aquariums up to 50 gallons. Featuring a sealed UV lamp submerged directly in water for optimal sterilization, it includes a 50 GPH pump and installs in just 5 minutes without tools. The unit is UL listed, runs quietly, and signals when the UV bulb needs replacement, making it a low-maintenance, effective solution to reduce algae and bacterial blooms while enhancing water clarity.

## Description

GKM9W Internal UV System with Power Head. Keep Your Aquarium Crystal Clear. Reduce water changes. 5 minute installation without any tools. Sealed water UV lamp for direct contact with water. Perfect for aquariums up to 50Ga. Lamp contains Mercury. Manage in Accordance with State Disposal Laws.

Review: Life-Saver for Green/Murky Water! - ​If you are struggling with murky, cloudy, or green water, stop scrolling and just buy this. I was dealing with a serious clarity issue in my planted aquarium (as you can see in my "before" photo), and nothing seemed to help. I decided to give the AA Green Killing Machine (9W) a shot, and it absolutely exceeded my expectations. ​The Results: ​Day 1: I noticed the "fog" starting to lift slightly. ​Day 2: Massive improvement. I could actually see the plants in the back of the tank again. ​Day 3: Total transformation. The water is now crystal clear—it looks like the fish are floating in mid-air (check out the "after" photo!). ​Why I love it: ​Insanely Effective: It did exactly what it promised and did it fast. ​Easy Setup: It took me less than 5 minutes to get it installed and running. No complicated plumbing or tools required. ​Quiet: I barely even notice it's running. ​Safe: My fish, snails, and live plants (Pothos, desertcart Swords, etc.) are all doing great and look healthier than ever now that the light can actually reach them! ​I am beyond impressed with how well this worked. It performed way above expectations and saved me from a massive headache. I would 100% buy this again and highly recommend it to any hobbyist dealing with water clarity issues. Best investment I’ve made for my tank this year!
Review: Good for shrimp and snails - I bought the 9W Green Killing Machine to deal with a sudden algae bloom problem in my established 20-gallon tank. It didn’t work quite as fast for me as some of the dramatic “24 to 48 hour transformations” you see online, but it definitely worked. I took pictures every 24 hours, and by day four the water was noticeably clearer and still improving. So if your results aren’t instant, don’t panic it just needs a little time. Before buying it, I had a few concerns that I know other people wonder about too. First, I worried about noise. Thankfully, the unit is virtually silent during normal operation. Installation was also extremely simple; it took only a couple of minutes from box to running. The water flow feels a bit weak at first, but that’s actually by design, the restricted flow increases UV contact time for better performance. I was also concerned about livestock safety, but it hasn’t bothered my shrimp, snails, or fish at all. Everyone stayed active and behaved normally the entire time. As for maintenance, I ended up taking it apart once because a small piece of grass slipped past the sponge and caused a brief noise. The good news is that it was very easy to disassemble, clean, and put back together. Another nice surprise: there’s no visible UV light while it runs. Even with every light off in the house, you can’t see anything glowing from the unit. The power cord is also plenty long, which makes tank placement flexible. Build quality is solid, and the unit is smaller than I expected. My tank is pretty packed with plants and decor, but it still fit easily the only drawback is that it sits toward the front and can’t really be hidden. Because of that, I won’t keep it in permanently, but it’s perfect to use whenever the water starts acting up. Overall, it’s a quiet, easy-to-use UV sterilizer that safely cleared my tank over a few days. It’s well built, livestock-safe, and simple to maintain. If you’re dealing with cloudy water and want a plug and play solution, this is a great option that genuinely works just give it the time it needs to do its job

## Features

- The GKM9W Internal UV System with Power Head is for aquariums up to 50 gallons. The GKM9W allows water flow in direct contact with the UV lamp, making it extremely efficient. Keep your aquarium crystal clear & reduce water changes.
- It includes the pump and takes only 5 minutes to install (no tools required). The UV lamp and pump are submersed completely in the aquarium and are attached to the inside of the aquarium with the included suction cups.
- 4" x 4" x 12" 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.
- Once your water is clear, there is no need to keep your GKM9W turned on 24/7. This will help increase the life of your 9 Watt UV lamp. Pump Flow Rate: 50 GPH. UL listed. EPA Est # 093568.
- Included components: Water pump, Sealed UV bulb, Control Box, Adaptor. Comes with UL plug, only suitable for US market.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B099KRCQPN |
| Additional Features | Sealed UV bulb design |
| Best Sellers Rank | #32,604 in Pet Supplies ( See Top 100 in Pet Supplies ) #109 in Aquarium Lights |
| Brand | AA |
| Brand Name | AA |
| Color | BLACK |
| Customer Reviews | 4.3 out of 5 stars 618 Reviews |
| Included Components | Water pump, Sealed UV bulb, Control Box, Adaptor |
| Item Dimensions L x W x H | 12"L x 4"W x 12"H |
| Item Type Name | Aquarium UV |
| Item Weight | 1.08 Kilograms |
| Manufacturer | AA Aquarium |
| Manufacturer Part Number | AAUV9W-B |
| Material | Plastic |
| Material Type | Plastic |
| Model Number | AAUV9W-B |
| Product Dimensions | 12"L x 4"W x 12"H |
| Product Style | Modern |
| Special Feature | Sealed UV bulb design |
| Specific Uses For Product | Indoor |
| Tank Volume | 50 Gallons |
| Target Species | Fish |
| Unit Count | 1 Count |
| Vivarium Type | Aquarium |
| Warranty Description | 1 year limited warranty except tear & wear part |

## Product Details

- **Brand:** AA
- **Color:** BLACK
- **Included Components:** Water pump, Sealed UV bulb, Control Box, Adaptor
- **Item Weight:** 1.1 Kilograms
- **Material:** Plastic
- **Product Dimensions:** 12"L x 4"W x 12"H
- **Special Feature:** Sealed UV bulb design
- **Specific Uses For Product:** Indoor
- **Style:** Modern
- **Tank Volume:** 50 Gallons

## Images

![AA GKM9W Internal UV for Aquariums up to 50Ga,Black - Image 1](https://m.media-amazon.com/images/I/812DxGpEH1L.jpg)
![AA GKM9W Internal UV for Aquariums up to 50Ga,Black - Image 2](https://m.media-amazon.com/images/I/61bh0JYw59L.jpg)
![AA GKM9W Internal UV for Aquariums up to 50Ga,Black - Image 3](https://m.media-amazon.com/images/I/71+kXPD7SEL.jpg)
![AA GKM9W Internal UV for Aquariums up to 50Ga,Black - Image 4](https://m.media-amazon.com/images/I/61W4DLtyvcS.jpg)
![AA GKM9W Internal UV for Aquariums up to 50Ga,Black - Image 5](https://m.media-amazon.com/images/I/71XbGYNve2L.jpg)

## Questions & Answers

**Q: My product stopped pumping water. How can I get a replacement? It's under warranty**
A: Hi, please refer to this video and clean the inside of the pump, usually it is something that got stuck at the impeller and it will start working after some cleaning. If this doesn't work, please reach out to AA Aquarium's customer service, there is a 1-Year limited warranty on the pump.

**Q: Will this kill off hair algae in a saltwater tank?**
A: I can only assume that it will not. I use the smaller version in my 10 gallon tank occasionally and it appears to have no effect on filamentous algae. It is very effective at combating algae bloom / microscopic, free-floating algae though.

**Q: Does this work with live plants? How will it effect my live plants drawf frogs??**
A: It won't negatively affect your live plants, dwarf frogs, or beneficial bacteria. Nitrifying bacteria are primarily attached to surfaces in the aquarium, not free-floating, so the UV light in this device can't harm them.

**Q: Can I use this in an axol tank?**
A: Yes you can, it’s safe for all.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Life-Saver for Green/Murky Water!
*by B***R on April 10, 2026*

​If you are struggling with murky, cloudy, or green water, stop scrolling and just buy this. I was dealing with a serious clarity issue in my planted aquarium (as you can see in my "before" photo), and nothing seemed to help. I decided to give the AA Green Killing Machine (9W) a shot, and it absolutely exceeded my expectations. ​The Results: ​Day 1: I noticed the "fog" starting to lift slightly. ​Day 2: Massive improvement. I could actually see the plants in the back of the tank again. ​Day 3: Total transformation. The water is now crystal clear—it looks like the fish are floating in mid-air (check out the "after" photo!). ​Why I love it: ​Insanely Effective: It did exactly what it promised and did it fast. ​Easy Setup: It took me less than 5 minutes to get it installed and running. No complicated plumbing or tools required. ​Quiet: I barely even notice it's running. ​Safe: My fish, snails, and live plants (Pothos, Amazon Swords, etc.) are all doing great and look healthier than ever now that the light can actually reach them! ​I am beyond impressed with how well this worked. It performed way above expectations and saved me from a massive headache. I would 100% buy this again and highly recommend it to any hobbyist dealing with water clarity issues. Best investment I’ve made for my tank this year!

### ⭐⭐⭐⭐⭐ Good for shrimp and snails
*by G***N on November 29, 2025*

I bought the 9W Green Killing Machine to deal with a sudden algae bloom problem in my established 20-gallon tank. It didn’t work quite as fast for me as some of the dramatic “24 to 48 hour transformations” you see online, but it definitely worked. I took pictures every 24 hours, and by day four the water was noticeably clearer and still improving. So if your results aren’t instant, don’t panic it just needs a little time. Before buying it, I had a few concerns that I know other people wonder about too. First, I worried about noise. Thankfully, the unit is virtually silent during normal operation. Installation was also extremely simple; it took only a couple of minutes from box to running. The water flow feels a bit weak at first, but that’s actually by design, the restricted flow increases UV contact time for better performance. I was also concerned about livestock safety, but it hasn’t bothered my shrimp, snails, or fish at all. Everyone stayed active and behaved normally the entire time. As for maintenance, I ended up taking it apart once because a small piece of grass slipped past the sponge and caused a brief noise. The good news is that it was very easy to disassemble, clean, and put back together. Another nice surprise: there’s no visible UV light while it runs. Even with every light off in the house, you can’t see anything glowing from the unit. The power cord is also plenty long, which makes tank placement flexible. Build quality is solid, and the unit is smaller than I expected. My tank is pretty packed with plants and decor, but it still fit easily the only drawback is that it sits toward the front and can’t really be hidden. Because of that, I won’t keep it in permanently, but it’s perfect to use whenever the water starts acting up. Overall, it’s a quiet, easy-to-use UV sterilizer that safely cleared my tank over a few days. It’s well built, livestock-safe, and simple to maintain. If you’re dealing with cloudy water and want a plug and play solution, this is a great option that genuinely works just give it the time it needs to do its job

### ⭐⭐⭐⭐⭐ Wow!
*by R***I on March 31, 2024*

I have a 3.5 month old 20g tank for my Betta, Otos, Hillstream Loaches, and various snails. I've been experiencing a "bacterial bloom" for about 5 weeks, even though my parameters have been perfect for months and my fish have been happy and healthy. I could tell my algae eaters were struggling a bit with the reduced oxygen, so I literally tried everything to get through the milky water phase. I finally broke down and made a post on a forum that I'm part of. Someone suggested more filtration, which I had tried, but the link they provided also suggested investing in a UV bulb as well. I wasn't feeling extremely confident, but the comments on this product had me feeling better. Many of the folks who bought this product got it to take care of an algae bloom, so I was a bit more concerned that it wouldn't help with my particular issue. I found a few great comments saying that it worked for their bacterial bloom and the price was great, so I figured, "What the heck?" It is similarly priced or even less than the cost of a second filter. This is an excellent product and it does exactly what it claims to do. I have had it in the tank for just about 3 days, but I already noticed a huge change in only 12 hours. The final photo is today (as of posting) and the tank is 100% clear from all angles. I'm sure that part of my issue was feeding my various algae eaters fresh veggies and yeah, I probably am leaving it in the tank too long. However, as many of you who have Otos, HSLs, or any other algae eaters likely know, mine don't gobble up food within 2 minutes like many other fish do. Now I don't have to compromise on what I feed them. They're happy, healthy, fed a diverse diet, and I don't have to compromise on visibility/oxygenation. I love this product and I would gladly recommend it to anyone facing any type of bloom in their tank that they've tried everything to combat. One word of advice, though: if your fish are sick, take care of them first. Put them into a hospital tank and care for them. Having visibility in your water will not heal your fish. Nor will most medications work if you put them in the tank with your UV light running. Happy fish keeping. ❤️

## Frequently Bought Together

- AA GKM9W Internal UV for Aquariums up to 50Ga,Black
- MarineLand Magnum Polishing Internal Canister Filter, For aquariums Up To 97 Gallons, 10.5 IN (ML90770)
- AA GKM24W Internal UV for Aquariums up to 120Ga,Black

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-05-19*