So all of your rimless tanks inspired me. I can't fully set it up yet, but I just checked my 20 XH to see how hard it would be to remove the rim to do one of these setups. Well, the tank is pretty old, so I got most of it off with my bare hands and got most of the silicone off the rim with a razorblade. It left a very thin layer of basically residue from the silicone on the glass. Any tips for getting this off? Any solvents? or just lots of scraping with the razorblade?
I've a got a great idea for a little African stream tank with lots of anubias, some dwarf frogs and tetras, but I don't have a place for even another small tank right now...we'll see in a few months though
That's a good way to get a rimless tank. I have found no better way to remove silicone than just lots of careful scraping with a razor. There's a thread over on TPT describing a riparium in a 15 XH, and he also removed the top rim:
http://www.plantedtank.net/forums/vivarium-terrarium/90239-15h-riparium-my-first.html
I wouldn't suggest a rimless tank for a riparium with emersed Anubias. Those are much better kept in a tank with a glass canopy, so that the air will retain high relative humidity. That is what I did for my 55.