Ya rootbounding can cause yellowing bottom leaves from my experience as well. Transplant the hash into a good sized cup and it will take off in about 2 days. As for catching up, ya you can let the others catch up with the hashplant except it depends on phenotypes remember. Some plants will end up lanky while others will be bushier. Think of them as a group of 6th graders lol Even though all will generally be about the same height, you'll always end up with some chubby ones here and there along with the tall skinny ones =D Just try to not have the ice+ak's in party cups more than 3 weeks or they wont be partying Ill tell you that haha Just like the hashy theyll be rootbound =O It's amazing the root structure mary jane develops so young Good luck ^_^