Quote Originally Posted by BlueBear
RW always has that potential to have PH problems, what about Rappid Rootters???
Adieu
rapid rooters are too small.

He is right...If you use the 4x4 blocks the roots will fill the r'wool before they grow all over. In fact, many commercial growers use ebb and flow for their seedlings, and clones just for this reason. i loove raqpid rooters, but they are just starter p[lugs.

I have reverted to rockwool for all my cloning.

BB the ph problem with rockwool comes from recirculating bad nutrient solution through r'wool...If you use ebb and flow with proper ph soltion then the r'wool will do OK. I think Most have4 problems with r'wool due to overwatering...peace