I when to my LFS yesterday and saw a 2.5 gal kit for $25. or maybe it was a 3.5 gal. Anyways, it comes with a hood, air pump/tube/air-stone, under gravel filter, some fake plants (which I want to replace with live ones), some food, and a small bottle of water conditioner (not a big deal since I have a huge bottle already for my 5 and 10 gal). Should I get a heater with it? I was thinking about putting a Betta along with maybe 2 ghost shrimps. Is this a good idea?? Will the under gravel filter do it's job in cleaning water, and will the filter harm the roots of live plants? (not really sure how under gravel filter works) Can Bettas be in the same tank with shrimps?? Thanks, and sorry for all the questions.