Hi! Recently I added a Rubbermaid flower pot to my 10 g tank for my c.orientals. It is filled from the bottom up with charcoal, aquarium grade gravel, then topped with polished glass stones. (I only added the glass stones on top of the gravel as they are to large to ingest, will not cut, or adhere to skin, or be uncomfortable.) In this pot are live plants - arrowhead, and (fig?) ivy. There are holes in the bottom of this planter so water stays in the pot to water level. It took 2 days for the larger female to feel comfortable with this new addition. She climbed on, hunkers down under the arrow plant, and seems to be enjoying herself. She stayed there thru the night, and only just dove into the water this morning. The plants will probably live "so long" hydroponically, but they are cheap, small ones, so replacing every few months will not be a problem. I also go to the "Goodwill" stores and look for attractive, safe, containers that are inexpensive, creative, and safe. You can add the same as above, or even soil, etc. (which I am applying in another tank). Anyway, just a suggestion.