AsNoriuanswered grow question 3 years ago The bigger - the better, if you plan to make huge above, you should have space for roots too !!!
I started to grow in 10 liters, stayed with 20 for couple years, then I went 30 only for one grow, now it's 40-50 pots , depending on veg length .
I use fabric pots for my photoperiods and airpots for autos or smaller plants.
If I would start from scratch - 50 liters airpots would be the ones to buy, but it's too much stuff already, so I don't invest anymore.
Good luck in your grow off!!!