HI I'm new to saltwater and am starting with a 20g tall until I move to a bigger place next spring where I'll set up my 80g and use this as my QT/hospital. I have my eyes on a condy and tube nem, so im wondering how long to wait until adding them? What exactly is it they need an established tank for? I've seen someone successfully keep 2 in a 3month old 30g. And how much will things 'carry over' if I pour my 20g's water and sand+rock over into the 80g?