I think watering equivalent of twice the size of the pot is way way to much. I used 11ltr pots and putting 22ltrs of water on to them is way over top. I feed/water slowly to give the water chance to soak thru, I stop once I see water coming out of bottom of pot, usually about 20% to 25% run off. The idea is if you have water coming from bottom of pot then the medium is full. If you are watering and you never see any run off, then eventually you will get dry pockets in the soil and these can be very hard to 're wet.