for watering we have 2 water tanks , one is 1500L and the other 2000L both connected to automatic dripers. we water every two days straight water and feed them 2 times a week with few days space inbetween. the drainage is not so bad, most of the plants capacitate the entire feeding, if there is water drainage it evaporated very quickly because its very hot during the days..
we are using for the veg plants pots between 15-30 L pots , and for flowering you put them in 30L up to 60L pots. watering each pot roughly between 2-3L per pot and so far seems like enough water, but soon the summer heat is going to kick in and we'll have to give them extras and more often watering.
any more questions please shoot away and I'll do my best to answer all.
You will be needing to water a lot more then 2 liters per pot in order to effectively wet the soil in a container that is 30 -60 liters big. The soil needs to be thoughly wet. Until the water starts to run out.2 liters is good for a 11 liter pot. Well thats what i do is is make sure that my soil is properly wet. - this is good for at least 2 -3 days between the next watering. But then everyone has there own methods and looking at your photos the plants are all beautiful.
Watering enough will be very important especially because I think that you can expect very very long hot summer days that will be apon us almost immediately. Already we have had extreme hot tempretures this past week, and its only mid February. I shudder to think how the summer in July/August/September will treat us.
Hoping that you have VERY good Air conditioners.
How many lights and how much Wattage per?
What nutrtients are you giving everyone?