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Okay, so I'm not saying I'm going to do this for sure, but I think saltwater tanks look really pretty!! Is there anything that can go in a 3 gallon- and I want fish, not just rocks. I will eventually try and upgrade, but at this point I'm in nursing school and can't really afford anything right now....
I think you'll have more success in a 10g and in a 3g you really won't be able to have any fish, but 2 at the most cause you want fish and not rocks. You do need the Live rocks for filtration and to help with the environment and bactaria, but you'll find that out with more research.
Good idea. I don't recommend a 3g for anyone just starting out in the SW part of the hobby unless you've done a lot of research.