How much water for watering

I see you grow in soil with BioBizz, so you don't have to do run off every time to avoid salt buildup. I usually water a bit lighter in the beginning, at that size I would probably give a liter every 2-3 days (when top 5cm of soil is dry). Once they're larger/ in flower, I simply water to slight run off, so usually around 10% of soil volume - for example for 15L pot 1,5L. I also grow in soil with BioBizz so you can have a look at some of my diaries for more precise reference, some have dates/amounts in the weekly notes.