i was reading around on a friends PC and a different forum when i found this link and wrote it down, here it is : dcberry69 Check it out, its got a broad range of info; on soil and hydro. Alot of info i hadn't heard of before. Its not strictly about growing MJ, but has scietifically proven facts on absortion rates of nutrients and other such useful information. Check out the ROOTS EXPOSED article and it explains about absortion rates and how complex proteins like messenger and other enzyme supplements are to large of a molecule to be absorbed by the roots in their complex from. The capsarin Strip and the symplastic pathway act as a filter and filter out larger particles to keep out pathogens like bacteria and fungas, but also filter out some beneficial additives. So in order for our beloved plants to absorb and be able to use certain supplements you have to use foliar feeding on them. Before reading around on this page, i had no idea. Check it out - its worth the time Peace Proteus