VitaLink Clay Pebbles are 8-20mm clay pellets that have a lower bulk density meaning they are lighter which leads to higher porosity and therefore more water retention. These pebbles offer a tumbled surface without sharp edges that can cut delicate roots and harm plants making them vulnerable to pests and diseases. They ensure good aeration (non-compaction) and are extremely stable in both pH and EC and help prevent excess acidity build up. The VitaLink Clay Pebbles perform excellently in Flood and Drain systems where oxygen exchange in...