Ok, I think I see what's going on here... I think my question is being interpreted as 'How can I get my MJ plants to grow themselves?'. What I was really asking was more like 'What is the most robust non-soil method of growing?' or, 'Which non-soil method am I lest likely to screw up?'. I've grown twice before (in soil 1 indoor, 1 outdoor) so I know how finicky it can be.

Basically the reason I am asking is because I am an enginerding student so I can occasionally get very busy and forgetting to check the pH for a few days shouldn't be fatal in the method I choose.