I have a 55 gallon glass pentagon tank that I just inherited from my uncle. I have no idea where to start as far as setting it up, design, and fish. This question is pretty much fish tanks for dummies. I want it to be freshwater and look like a river bottom...with large pebbles and a few larger rocks. Does anyone have any ideas/suggestions/expertice/advise to offer about setting this up? I want to use artificial plants so I would like suggestions about that also. Fish ideas are also great! Thanks.