Join Date: Jul 2010
Location: Outside Philadelphia, PA
I wouldn't trust rubber objects unless I tested them first, using a small tank setup. Some rubber or rubber like materials can rot over the lobg term or give off stuff you don't want in the tank.
As for any kind of theme tank, I feel that usually you want to showcase the fish and plants, so if it's going to be a theme tank, it needs to also show off the fish and plants first. I have only see a few them tanks that I thought really worked from an aquascape standpoint. Of course this is strictly my opinion and not everyone will agree with me.