AA Aquarium Green killing Machine 9W Internal UV for Aquariums up to 50Ga
Description
The GKM9W Internal UV System with Power Head is for aquariums up to 50 gallons.
- - Helps keep your aquarium water crystal clear & reduce water changes
- - The GKM9W allows water flow in direct contact with the UV lamp, making it extremely efficient
- - Fast and easy installation, takes only 5 minutes
- - All GKM products are manufactured in an EPA Registered Establishment
- - After assembled approx. dimension 4" x 4" x 12" long. LED signals need for a UV Bulb replacement, easy change without tools
- - Complete set includes: Water pump, Sealed UV bulb, Control Box, Adaptor. UL listed.
Please note that the product information displayed is provided by manufacturers, suppliers and other third parties and is not independently verified by Petco.
Specifications
| SKU | 1237020 |
|---|---|
| Primary Brand | AA Aquarium |
| Days to Ship | Ships Next Business Day |
| Personalized Item flag | No |
|---|
| Length | 9 IN |
|---|---|
| Height | 7 IN |
| Width | 3 IN |
Assembly Directions: (1). Connect the pump and the UV Lamp Assembly with the elbow. (2). Submerse the assembly in tank for 30s to allow air bubbles to escape. (3) Submerse the UV lamp assembly and the pump completely in the aquarium and attach to the inside of the aquarium with the included suction cups. (4). Connect to the control box and transformer. Please read instruction booklet inside package. To maximize UV bulb life, we recommend to use GKM when the tank is with green water problem, switch off when water becomes clean or turn it on 8 hours per day.
Description
The GKM9W Internal UV System with Power Head is for aquariums up to 50 gallons.
- - Helps keep your aquarium water crystal clear & reduce water changes
- - The GKM9W allows water flow in direct contact with the UV lamp, making it extremely efficient
- - Fast and easy installation, takes only 5 minutes
- - All GKM products are manufactured in an EPA Registered Establishment
- - After assembled approx. dimension 4" x 4" x 12" long. LED signals need for a UV Bulb replacement, easy change without tools
- - Complete set includes: Water pump, Sealed UV bulb, Control Box, Adaptor. UL listed.
Please note that the product information displayed is provided by manufacturers, suppliers and other third parties and is not independently verified by Petco.
Specifications
| SKU | 1237020 |
|---|---|
| Primary Brand | AA Aquarium |
| Days to Ship | Ships Next Business Day |
Reviews
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Customers say
Customers overwhelmingly praise this UV sterilizer for rapidly transforming green, cloudy water into crystal-clear conditions within 2 to 7 days, with many seeing results in 24 to 48 hours. Reviewers describe it as highly effective across tank sizes from 10 to 75 gallons, with nearly 90% expressing strong satisfaction and recommending it as a reliable solution for algae and bacterial blooms. Installation is consistently noted as straightforward and hassle-free. A small number report minor issues like non-functioning bulbs or insufficient power for larger tanks, but most consider it a worthwhile investment for restoring tank clarity.
Most Helpful Favorable Review
Makes water Crystal Clear in a week MAX!!!
Aquazan
13 years ago
This product is absolutely exceptional! My aquarium had such hazy/green water th...
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221 PEOPLE FOUND THIS HELPFUL
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4
Most Helpful Critical Review
LOVE/HATE
TurtleOwner2
13 years ago
LOVE: It works great. You will see clearer water within a week and it is super e...
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246 PEOPLE FOUND THIS HELPFUL
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123 Ratings-Only Reviews
UV bulb died after 2 months
No, I do not recommend this product.
Great product
Yes, I recommend this product.
Never worked
No, I do not recommend this product.
Eliminates both green and white water cloudiness
Yes, I recommend this product.
From white clouds to ultra clear water in 5 days
Yes, I recommend this product.
Great Product!
Yes, I recommend this product.
Give It Time and It Will Help
Yes, I recommend this product.
Quick turnaround
Yes, I recommend this product.
Questions
How easy to clean device?
- Super easy to clean comes apart several piece so you can soak in hot vinegar water and scrub with toothbrush
Helpful?
This replaced another that failed and it doesn't seem to be doing much; the water flow is very low. How much water flow is normal and how do I tell it is working? The light is on, but the water quality is worsening rapidly, like when the other failed.
- The small blue filter pad on the outside of your unit might need cleaning. Or the UV lamp inside is beginning to fail. The replacement UV lamp is around 10$. In my experience these last about 4 -6 months before lamp failure if run all the time. These units are low flow so you might not be able to detect water movement. It is always possible the unit you are currently using is faulty, but improbable. I would A. Clean the unit/filter pad. Then B . replace UV bulb. And make sure your green killing machine is rated for your tank size. If these do not fix, then you might need a whole unit. Good luck to you and your fishes.
Helpful?
Can this be used in a saltwater tank with corals?
- The GKM can use in both freshwater & saltwater aquariums. There's no chemical inside the GKM and it helps to clean water by the UVC lamp. Recommend to connect to a timer & operate 8 hours a day, this helps to improve UVC lamp life.
Helpful?
Hello. My tank is very green and I trying to find a way to fix it. But I’m not sure how to when I have baby fish and baby snails. Would this pump be safe to use with babies in the tank? I don’t want them to get sucked in.
- If you look at the picture, you can see the blue, coarse sponge that goes over the intake. I feel that most babies would not get sucked through this sponge.
Helpful?
What size tubing can fit on this pump and is it outdoor safe? I need something to stop algae growth for my 30 gallon outdoor pond.
Is this 9 watt appropriate for my 60 gallon reef tank for dinoflagellates? With all the rock in my all-in-one tank I probably have closer to 50 gallons in my main display.
- Hi Max, we will recommend 24W size for over 50 gallons aquarium. In your case, you can still use but may take longer time to see result.
Helpful?
Why wont mine come on anymore after I hook everything up again? It had been working fine then one day just would not start again.
- It may be that the bulb needs replacing from what the info that came with my package says. The replacement is sold as the bulb in the sealed bulb housing, you can’t open it and just replace the bulb. Hope that helps.
Helpful?
I love this product. It cleared my 40 to 50 gallon tank in two days. How do I maintain it?
- Clean it every 3 months or so, and change and clean the little sponge filter.
Helpful?
Can this be used outdoors will be occasionally exposed to rain?
- This is not the right product for outdoors.
Helpful?
I've been having an issue with stubborn brown algae in my 15 gal tank. And now I see some brown algae spots starting to appear in my 9 gal. Would this product help with brown algae (Diatoms)?
- This product kills bacteria and algae by exposing the water to UV light. A small pump pushes the water through the UV light housing, so you or the fish are NEVER exposed to the UV light itself. My 50 gallon tank sits outdoors, so you can imagine the Algae growth. While this unit does not stop 100% of the algae growth, there is no question that it slows it down substantially (instead of changing water every week, I can do it every 3 weeks...)
Helpful?

