save the earth too:D forgot to mention, always keep air flow over the hydroton when drying on the rack, and when they are dry, just bounce them up and down over the mesh to get the clay dust off. The dust shows up every wash, and to do this keeps it from getting in the rez when you plant. Also, when I plant, I go ahead and flush with plain water to get the remainder of the dust out of the pot. Seems like a lot, but it isn't.