Too much UV?

[So-Cal]

I have a large UV Sterilizer for my 150 gallon reef tank that I run 5 hours a day. My question is can I run it longer or even add a second one or could that harm my system.

[Myka]

What do you think you're using it for?

[viperfish]

Adding another unit isn't going to make a difference unless the first one is not enough for your system. Either way it's not going to do any more to your system than it's already doing.

[Proteus]

What do you think you're using it for?

I'm using mine To take up shelving space in my garage

[Raf]

yes you can run it longer, I run mine 24/7. Just make sure the wattage and flowrate are correct for the given aquarium size and make sure the bulb is not old or else its a waste of energy even at 5 hours...