various tools for keeping houseplants in passive hydroponics clay pellets

various tools keeping houseplants passive hydroponics clay pellets aggregate baked ball botany brown chalk copy space fertilizer flower pot gravel growing plants growth house plant houseplant hydro hydroculture indicator insulation irregular isolated nature no soil object organic subirrigation pebble pebbles pelleted pothos potted propagation roots semihydroponics system tool tropical water level regulation root