I just purchased a nice little 14 Gallon AIO tank for my office.

I am looking for inspiration. It has to be FW, and I don't want to use fake plants. It has to be very low maintenance (water changes every other week would be fine, but not much more).

So, what plants and livestock would you recommend for a small 12x12x12 cube? I have a few ideas, but I am curious to hear what others would do, as maybe there is a great idea I haven't thought of!