Originally Posted by Schism
They have their advantages and disadvantages. Honestly ive never encountered a time when i needed one or wanted one.
For reef tanks i think they do more harm than good, fish only tanks is where they have the most usefullness.
I agree with this, I don't like to have UV
on my reef tank as there should be other way to keep your tank crystal clear.
As for UV
to kill parasite in the water, the proper QT should replace a UV
at 99% of the time. If you do want to keep 1 on you tank, only turn it up when having issues.