COODIA Green Water Killer Aquarium Filter UV Pump

I honestly should have taken pictures of before and after…. For some reason our 50 gallon aquarium suddenly started having uncontrollable alage issues after it had been fine for several years with regular water and filter cartridge changes and tank cleanings. It got so bad my wife and I were having to change the water weekly or more and it was going opaque green fast. Besides the headache I worried this was going to hurt or kill our fish from stress, constantly changing the water. You couldn’t even see the fish unless they were near the glass it would get so bad in just a few days. I found this and we installed it within an hour of it arriving. As expected it didn’t look like much was happening for the first 3 days or so. After 5 days it was obvious the filter was gaining the upper hand on the algae. The water got clear but cloudy still for about another week and now we have clear, pristine beautiful water. Our algae problem was extremely bad. My wife was worried it wasn’t working the first few days. She wanted to change the tank water again but I asked her to please wait and give the filter a chance and I told her I’d watched videos from other customers where they said give it at least a week minimum. We’re both very happy and she told me I really needed to come on here and leave a positive review. Now that our tank is clean I plan to only run the uv filter 6 hrs a day on a timer. The filter keeps the water perfectly clear but doesn’t kill algae on the gravel so our huge foot long pleco still has food and work to do. My wife has had him since before we met so she was very concerned we’d have to feed him pleco wafers or he’d starve. Thankfully the Uv filter has achieved a good balance in the tank.. if the algae comes back or stays gone I’ll increase or decrease the time it runs until I find the right amount of time needed. It is very difficult to see the uv light through the viewing hole even in a pitch black room. ⚫ The instructions explain how to easily open the filter and just plug it in for a few seconds to visually see the light bulb works. It’s purple like a bug zapper bulb and not that bright but it definitely does the job. Considering replacement bulbs are available and the unit isn’t that expensive we are happy with it. If the unit itself lasts a reasonable amount of time (few years) and had to be replaced we’d probably buy it again. We totally expect to have to replace the bulb every so often depending on how much we have to use it. Satisfied customers, thank you for getting our aquarium back in balance.

This is a miracle pump. I’ve had aquariums on and off for the last 30 years and never have I seen this kind of algae bloom. I couldn’t get rid of it. It was actually much worse than the “day 1” photo depicts. At the time I took that photo I had removed almost all of the decor due to having to do 50% water changes every 2 days. It was ridiculous. I didn’t want to add chemicals that may or may not have harmed the poor fish that were already surrounded by horrible green algae ridden water. I did a lot of research online and this is the pump that was most recommended. After seeing a lot of photo reviews that greatly resembled my very green aquarium, I took a chance on it. I was extremely skeptical that a pump would eliminate the constant green water, but to my surprise it actually worked! I really wanted to do this review because nobody has mentioned using this pump for smaller aquariums. The listing for this particular pump says “for aquariums up to 75 gallons”, it doesn’t give specifics for small tanks; but I took a chance and tried it anyway as a last resort. My aquarium is a 5 gallon aquarium. They’re very common in size and even 5 gallon aquariums can be subjected to the green water conundrum. This pump, even though it doesn’t fit in my aquarium upright, it still fits lying down and is fully submerged. On day 1, I couldn’t even see my fish unless they were at the front of the aquarium directly under the light. Day 2 wasn’t really much different. I didn’t think this pump would actually work, but by day three I could not only see the fish but I could also make out the heater on the back wall. My aquarium was clear enough by day 4 that I started moving my other aquarium decor back in. And on day 5 my aquarium was crystal clear. No green water, no traces of green water, and I can see everything in the aquarium including the wallpaper on the back wall. There were no chemicals added. I used this pump in my 5 gallon aquarium for 5 days and my water is more clear than it has been since this aquarium was established and cycled for the very first time. It’s like a brand new aquarium and my fish are super happy. I don’t know how or why this pump works, but it’s pure magic. Having said that, this pump comes fully assembled. It includes oxygen tubing for aeration if you choose to do so. I didn’t need the extra aeration so I didn’t install that piece. It can be used 4-8 hours a day as the instructions suggest. I personally used this pump for 4 hours during the morning and again for 3-4 hours in the evening to get the results that I did. The results may vary given the size of your aquarium. I plan to leave this pump where it is for now. The instructions say once the water is clear you can reduce the time, so I’ll leave it in the aquarium and gradually reduce the amount of time I use it. I did a 30% water change on day 5, AFTER that photo was taken and it was just to clean the gravel and debris from the standard aquarium filter. This green water killer pump is amazing and the results really do speak for themselves. I would have gladly spent twice as much money for the results that I got! It’s truly unbelievable!! My fish are happy and their environment is healthy. I’d consider that a win! Highly recommend!!