Small to intermediate - and occasionally large - streams with moderate to swift flow and sandy substrates. The headwater streams where lowland shiners are found generally have moderate flow with alternating runs, scour pools, and often pools created by root dams. In headwaters, lowland shiners are generally found in scour or plunge pools, but in larger streams they are frequently observed in eddies immediately downstream from woody debris, overhanging woody vegetation, or aquatic macropytes.
Based on that, I think I'll switch out the gravel I currently have for sand in the tank they're going into. I already have some smooth river rocks, and some driftwood in the tank. I'll probably also add some plants in at least one corner. If you keep them, tell me about your tank.
Thanks,
Adam