AquaUltraviolet Advantage 2000+ Inline 3/4" Barb - 15 Watt Aquarium UV Sterilizer

I had read the positive reviews with skepticism, but at that point was ready to try anything to help control the dense bacterial bloom and dino algae growth. It had gotten so bad one could hardly see the fish! (sorry I didn't take a before photo..) I hooked this device inline with my Fluval filter (did have to get a new hose and connectors) but once turned on, it took only 24 hours to start seeing a difference! The bacteria bloom is almost gone; I'm hoping the dino's start disappearing soon.

The unit was a pain in the ars to get hose and adapters to fit after my eheim pump, as the hang-on side version is easier to install for eheim tubing. Yet this is a huge benefit for my fish tank, as it is strong enough to kill parasites/bacterial diseases as well as algae. My water is perpetually crystal clear, more so than even new tank water , without even the tiny particulates. It looks like the water was polished and of high clarity. The only dowmfall is that the water clarity MISLEADS YOU into thinking the water is clean and not need water changes... YOU NEED TO MAINTAIN water changes so the amonia build up won't happen (from fish pissing & waste), plus to stimulate fish growth. You can offset some water maintenance by increased biological filtration, but water changes are just mandatory. Don't let the extreme clarity of the water from this UV fool you.. It's a great product for keeping your fish safe from harmful disease, unlike the weaker UV. Don't buy any UV less watts than this one or you won't gain the benefit of parasite killing UV levels ..

This killed the brown alge bloom I had in my 70g reek in 24 hours! Crystal clear water! Best ever! Buy it! Kill the dinos!!!

I have this mounted on my return pump from my refugium. It fits very well and was extremely easy to set-up. In addition I have it on a timer, so I don't run it 24hours a day. I shut it down at 9pm and back on at 7am. My water is crystal clear.. In my opinion every tank should have some kind of UV lighting. Just remember this kills all the bacteria in the water including the good stuff. Installing the light is a snap. Be sure to test your sealing by flowing water for at least a half hour before inserting the bulb system. You don't want even a drop of leakage. It MUST be 100% sealed. update 11/23 Still going strong and working like a champ. Reef tank is crystal clear and NO algae. UPDATE: 1-28-2018 Still running perfectly crystal clear water.. UPDATE 7-13-2019 STILL RUNNING PERFECTLY, going to replace my second bulb. I have the unit on two quick disconnects and it is perfect. NEVER had a leak or a problem all this time

Works better then the skimmer