They are clay balls, made of ceramic clay. They are used to soak up water and hold the plant upright without using soil.:jointsmile:
LolaGal Reviewed by LolaGal on . Little round things packed around rockwool? This is my first time with hydro. I was just wondering.... ive seen a lot of pics with little reddish round things packed around rockwool... they almost look like tea nuts. what are they? and whats the purpose? Rating: 5