Hey, I was wondering what the min requirements are if I wanted a tank to hold plants that have outgrown my 5.5g. Would a couple inches of gravel and lighting be enough? Might put some amano shrimp in there too, so would I need a filter if I do weekly water changes? Not sure about a heater either. It'd probably be in my basement, and it's around 68-70degrees down there. Would it even need water changes and a filter if I kept only plants in there? Thanks!