Do you know any growers who have used a 20l pot with the drip system?ha ha red I do get some lucky finds its either from landlords finding a grow on there property or police raids the boss wont tell me the bastard there was also 20 ltrs of canna A +B that's being redistributed around a few local growers after all we do recycle ha ha and red if I did win the lottery I would have my own canna island some where nice and sunny and to be honest red I normally do as you say and water to run off before I refill the res I noticed by doing that my root ball was huge and don't forget my drip rings only pump out 300 ml a minute into a 20 ltr air pot oh red why do I do these things that make me think it hurts ha ha will probably start off as you said then erm wing it