Agree with Bunjiweb...I have a 24G and sometimes there's not much to do. Others, a ton. My new boxed tank sat on the living room floor for over a month plus before setup....just reading and researching.....which is the BEST place to start when preparing a marine tank. Tonite, eg, I had over an hour of work to do on the tank.
A 10G IS a small tank. However, some people have set up 'pico' tanks..only a couple of gallons. But..the smaller it is..the more potential for problems/headaches since there is not a lot of water volume to absorb errors. If you plan to go this route, I caution you that you MUST READ UP ON IT. Still..the larger the tank you can do, the better off you are...same as FW. SH