sour diesel, glue galeto

OK, I will try and covert to US measurements. Your air pots are 22l, which says around 5 gallons. So using only 1.2 litres (1 quart) would not get to the bottom of the pot. I assume your air pot is like a fabric pot. To put into perspective, I use 3 gal fabric pots, and I use 1 gal of water to get the bottom to drain somewhat. So, you will have to use 3-4 litres of water, to get the pot to drain from the bottom. I recommend this, as it will help keep nutes, salts, mineral buildup in the bottom part of your soil, from accumulating. If air pots act like fabric pots, your likelyhood of over-watering is nill, if you use the 2 knuckle approach in checking your soil dampness. Soil should be cool, but not damp. Hope this helps.