So in my 20+ years of being in the hobby I never had the unfortunate chance of having a green algae bloom. Well I bought some water spangle from ebay and put it in two tanks. Well wouldn't you know it a few days later I had some BAD green water going on.
I tried the methods that my old timer friend suggested, no lights, cut down on food add some hornwort well nothing worked. S I read up on Uv
Since both tanks held fry I needed something "fry Friendly" as well as something that wasn't terribly expensive. ( I am a thrifty old guy) So I found the green killing machine. I reasearched that the 9 watt unit would work in up to a 50 gallon tank so that was the hot ticket for me.
Now on amazon and at the box pet stores these things are upwards of 50.00 . I managed to find one on E bay that was "open box" well it arrived and I found the power head did not work when plugged in the little quick connect. I simply used some crimp connectors to remedy the issue.
So how good does it work you ask? Well DARN good. This is before and after with it running 4 days with no water change.
I've got to throw a snail in to get the algae of my wifes shark decoration