Hi, I need to redo a small 2x1.5x1.5 ft goldfish setup for a relative and wanted to give it a face lift in the ways of nature aquarium, primarily hard-scape only with a proper sand substrate, river stones and branch woods. But also wanted to add some goldfish-safe plants to it. What would be a good choice of plants for such a setup? Something that can go near the base of the rocks or on the woods and works well in low light? Thanks