Live rock serves as biological filtration. Your tank can support live rock, but if you intend on keeping coral and/or anemones, the Eclipse top would need to come off. Would have to come off for a skimmer or refugium anyway. Eclipse systems are generally meant for FW
systems. They are inappropriate for marine. The tank is fine. Would just need a new lighting system and a skimmer or refugium. There are internal protein skimmers, but these are a pain the butt to deal with.
Whether you're looking into doing a reef set up or not and just want to provide more bio space, any rock that is inert will do just fine. Inert rocks won't change water chemistry like lava rock and lace rock. These will grow bacteria on them too. Live rock is already impregnated with bio bacteria. That's all live rock is...rock already populated with nitrafying bacteria. Doesn't neccessarily need to come out from the ocean
Just get some lace and lava rock and set it in water flow. Eventually it becomes live rock. Cheaper too...LOTS cheaper...LOL.
We, as a people, know so much more about outer space than we do about our own oceans. This lack of knowledge can very well spell the dangers that lay in wait for us.
The oceans surely would swallow us before a rock comes down to smite the planet of it's life.