To answer your question all you need is 100% silicon to glue the glass together. You can get that at just about any hardware store. As for the smaller pieces of glass you should be able to get them from a hardware store as well. In the past I have had Ace Hardware actually cut a piece of glass to size for me. BTW the acrylic idea is a good one for all the reasons Tom stated, but I'm sure it will cost quite a bit more then a pre-built glass tank, some silicon & glass.