Nothing to add aside from what's been said about the fish, but if you're looking for some plants I've had great success with Bacopa caroliniana in low-tech tanks. I've had it with ~1 wpg of light, no CO2/ferts and while it wasn't growing fast it stayed healthy - moved it to a tank with med-high light, CO2 and ferts and it's growing like gangbusters, I can hardly keep it trimmed.
I think someone mentioned that the plant you had wasn't aquatic - unfortunately that happens much more than it should, especially at chains like Petsmart, PU, etc. Best to stick with the hardy standards like java fern, anubias and crypts - they are slow growers for the most part but can easily survive in low-tech tanks and they're all aquatic plants so no worries about them rotting when submerged and messing up your water parameters.