cmon dude, u coulda figured that out...
BTW; Higromite is much better than Hydroton. Its pH neutral and has a high silica contentimp:
KingSloth Reviewed by KingSloth 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