no responses for such a simple question? if substrate or LR is totally up to you. but you may want to take light and flow into consideration, ric floridas like a little more intense light than yumas, both seem to like medium-low flow, imo. if you look at pics you will see the rics on rocks and in sand, so its a personal preferance. whats it look like? congrats, and my condolances, congrats on your first ric, sorry that you too will soon be addicted....