uv sterilizers

[Seamazter]

yes Kein, anything alive that passes by the bulb in long enough contact time gets fried.

Your amphipods isopods copepods all die in contact with uv light, not only them but thier food source too, any live phytoplankton will be killed, this will stop your system from creating the food your micro organisms require.

I have used UV before as well as ozone, and they most certainly do what they are said to do, i choose now not to though in order to have a diversity of marine fauna in tank.
Im certain my corals are happier because of it, there are other ways to control the benifits you get with UV or Ozone. Proper husbandry and knowlage being the largest.

When i did use UV it eradicated my tank of Ich, for that i was very happy, however now my cleaner wrasse has something to eat, Same for micro algea from the tank glass, UV rids it but then my tang has nothing to nibble on.

Uv is bad for anything alive that passes by..