okay so i bought some live rock refugium rubble, and it is curing right now in a bucket. They say it is already pre-cured but should be cured again since it has been out of water during shipping. It is rubble and it really doesn't have any sponges, or other stuff on it besides coraline algae and green algae and some black looking algae stuff. Anyways, it looks fine to put in the tank, and my tank doesn't have anything in it but live sand and base rock. Is it okay to put into the tank?

You could let it cure in your tank. It'll actually help your tank cycle. My first saltwater tank sat for three months with LR and LS. I didn't have any issues with that tank. The algae's are just part of the cycling process. Do small 10% weekly water changes and check your water before adding any livestock