Just wondering wat all I should have/ put in my qaurentine (can't spell) tank??? All I have is an empty biocube with live sand and water just running thro it right now. Idk if I should sell the biocube and just buy a 20 long or if I should keep it??? Need advice!

I wouldn't waste a bio cube on a Q tank, a 20L with a heater and HOB filter, and maybe a powerhead would be all you would need. I am working on getting one setup myself, but im not really in any hurry as i dont really have any room for new additions ATM.

That is what I was thinking, it would be a waste of a perfectly fine biocube...would I need to put sand and live rock in the tank of nothing except for some pvc pipe for cover and hiding spots?

No sand or live rock, you want to keep as simple as possibe, i would say some PVC and eggcrate for frags would be all you would need.