I mentioned to my husband today that I wanted to get a 3 gal tank to set up with corals and maybe a goby. He was really excited about the idea so I'm looking around for some info. Does anyone have a picture of their setup? Or anything you recommend for a tank of this size? I see that the 3 gal don't seem to have a lid, is this true? I kind of need a lid because where it's going to go it's going to be accessible to a couple of curious cats

That's why I may need to consider a 6 gal, which is fine because then I can put more in it!
Thanks for any ideas!
Christine