Want a clean rimless look for your reef aquarium? The ADA (Aqua Design Amano) aquariums, which are typically used as freshwater planted tanks, make for great Zoanthid and softy aquariums. Their small size means they can fit anywhere and their clean look means they will be quite stylish. If you want to incorporate a protein skimmer or refugium, just go for the hang on tank/hand on back (HOT and HOB respectively) equipment. If that equipment takes away too much from the look you are trying to achieve, simply drill a few holes in the tank and plumb it to put the equipment out of sight.