Gratz on finding such a deal on LR
. Once you get it set up, make sure you post pictures.
In terms of substrate, most people (including myself) prefer sand over crushed coral. The most voiced opinion (and only one I'm concerned with personally) is that extra food and other wastes gets stuck in crushed coral easily and ends up effecting your levels. Even though most will voice against "live sand", I picked a good amount up for my tank. This gave me the "natural" look that I wanted in terms of sand and having some crushed up coral and shells in it., but not enough that it would cause an issue with nitrates. Some will say that using other sands will do just fine if cleaned well, but I have no experience with it. If this reef tank that is being taken down is selling his LR
, you might want to ask him about his substrate and if he would part with some of it as well.
Hope the setup goes well. Get enough LR
in your tank from that large setup and you can set yourself up for a shorter cycle.