AA GKM9W Internal UV Spare Bulb Twin Pack (2 Items)
$64.99
Price: $64.99
(as of Oct 31, 2025 12:07:46 UTC – Details)
This Bundle includes 2X GKM9W Internal UV Spare Bulb. Keep Your Aquarium Crystal Clear. 5 minute installation without any tools. Sealed water UV lamp, making the GKM incredibly efficient.
Product Dimensions : 11.15 x 6.62 x 2.76 inches; 14.39 ounces
Item model number : GKM9W
Date First Available : March 24, 2021
Manufacturer : AA Aquarium Inc.
ASIN : B08ZYTDSKL
Customer Reviews: 4.4 4.4 out of 5 stars 123 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
This Bundle includes 2X GKM9W Internal UV Spare Bulb.
Sealed UV bulb design – avoid UV housing deteriorate, fresh with every bulb change.
NO TOOLS REQUIRED! No gloves-No mess-EZ bulb changes!
No Guessing – Control Box LED tells you when to change bulbs!
Once your water is clear, there is no need to keep your GKM UV System ON 24/7. This will help increase the life of your 9 Watt UV lamp. EPA Est # 093568.
Customers say
Customers report that the UV bulb works well for months without issues and keeps water clear, with one mentioning it effectively controls green algae. The product receives mixed feedback regarding quality and lifespan, with some finding it poor quality and short-lived. Customers consider it quite expensive.
DankTetra –
Amazing Algae Killet
Amazing product, works beyond any expectations, lasts longer and incredibly easy to install. Amazon shipping of course dropped off at the wrong address but thats an Amazon issue not the Seller
Anon9998 –
They Fit and work!
We needed a replacement bulb for our Green Killing Machine clarifier in our 55Gallon fish and planted aquarium. Most of the stores within 100 miles did not have one in stock.Decided to order the (2) pack and hope it fit and works. It fit and has been working for months without issue. The water has stayed clear. We leave the clarifier on 24/7.We only turn the aquarium lights on for a few hours each day following the advice of a San Francisco based Chinese aquarium store that has been around for decades. Was a YouTube video. They said the key to their minimal maintenance setup for their store is they do NOT run the aquarium lights more then a few hours a day. That has made a huge difference in our maintenance routine.If you need a replacement bulb for the Green Killing Machine 9Watt clarifier this fits and works. Do not risk the health of your fish buy going cheap.Low price low quality equipment is always a risk and most times results in losing fish, heartache, wasted time, followed by buying the better stuff you should have bought in the beginning which means you spent more then everyone else in the end.
Amazon Customer –
Too bad
I used this filter for years and last year or so been having lots of problems. Customer Srvc is nice but I canât afford to keep spending money ALL the time on filters that stop working. Quality control has become issue. This used to be great product.
John Autin –
Works, but expensive
It works over 4-5 days and will last longer. Quite expensive though. Wish they sold one a piece.
Robert –
Great replacement package
A bit expensive but works great with refreshing the UV light in my fish tanks. They seem to last and as I only run it 12 hours per day for maintenance. Water is now always clear.
jd –
great for your fishKeeps the tank wwater
Keeps the tank water clean and cleat
JK123 –
Short lifespan
After purchasing the Green Killing Machine for 4 fish tanks, I found the 3 of the 4 bulbs only lasted 1-2 months before failing. Thinking it might be a result of something other than poor quality, such as power surge (given all of the good reviews), I ordered 4 replacement bulbs and replaced the 3 failed bulbs. 6 weeks after installing the replacement bulbs, one of the new replacement bulbs failed. Though past the 30-day window, Amazon is helping with a return. When they do work, the bulbs do effectively take care of green algae and potential pathogens. Just wish they lasted a LOT longer given the high price.
Cindy –
Keep green algae out of my tank in Green Machine
Green Machine replacement bulbs in my aquarium! Keep the green algae at bay