I have about 2-3" of Miracle Grow Organic capped with about an inch of PFS. What're some good plants I can use to provide some ground cover? This is a pretty low tech tank. No CO2, a single T8 light, dosing Flourish twice a week. I'm pretty tired of seeing bits of bark and such come up every time I stir the sand. I was looking at some Starougyne repens but we'll see.