UV system

[jerry iske]

I am cycling my new 90G tank w/50 gal sump have protein skimmer running and live sand and 100lbs live rock. 3 days cycling so far. When should I add my uv system?

 

[bertoni]

[welcome]

You could add it at any time, but it's not really going to do much useful until the live rock's cured and you're ready to stock some animals, IMO.