if you new growth is green er and healther then old growth your doing the right thing! you may not get a good yeild this time but you learned alot! also to keep your internodes tighter keep them lights only 2 or 3 inch's away from plant. you should start that with the newwer plant i see in last pic. for me when i and cal mag i do 1 tbs per gallon with 1 tbs H2O2 to help wash out the crap..As for root bound ,theres arguably no such thing..its all in the control of nutes.sure you wont get the biggest plant in the world but if you look around you'll find threads with party cup grow contest and shot glass grows...