I have a 68 litre tank that I've been considering switching out the natural gravel substrate to sand. At the moment I have a large-ish Amazon Sword, Java Fern, Elodea (floating) and some stem plants that I forget the name of (maybe red lud?) planted in straight into the gravel. I use osmocote root tabs to provide fertilisation, otherwise I don't do anything special for my plants. The tank is currently home to some white cloud mountain minnows but I'd quite like the option of making this a community tank, maybe with some pygmy corydoras or even using the tank for an axolotl one day. I'm not really sure how to do this with live plants? Or if the plants will even grow in sand? Would I need some soil underneath the sand? Or should I just leave it as is? I do really like the gravel but feel it limits future stocking options. I'm also not sure what the best and sand to use or where to get it in Australia? I'd like something natural looking. Maybe pool filter sand?