tkeracer619
New member
For a 120g tank a 25w aquauv should be sufficient. No need to run the 40w. That said, the Coralife is garbage. Don't waste your money. The 25w Aquauv will be much more effective. While it will likely help a bit with cyano, I don't think it will do much for GHA. I do however swear by UVs as they do have a very good impact on overall water quality and clarity and the AquaUV's are 2nd to none.
Agree with this post. I would however run it with its own pump and not inline with the return.
Also, plumb it in such a way that when the power is turned off to the pump the unit doesn't drain.