Perfect, thanks! 
I always hand water for 30 days (because I don't have two sets of autopots), so I will turn on airdomes on day 15 as you said. This time I lowered growing medium by 1/3 and also perlite. Let's see what will happen...

I always hand water for 30 days (because I don't have two sets of autopots), so I will turn on airdomes on day 15 as you said. This time I lowered growing medium by 1/3 and also perlite. Let's see what will happen...