I also got a 7 liter tote and you could do six then transplant to something bigger when needed or you could do what im doing and just put 3 holes and there should be enough room for the roots and for nutes, since 3 liters= 1 gallon the 7 liter is enough for 2 gallons of water and with GH nutes I do 1 tbs per gallon of water mine are doing fine. GOOD LUCK with your growHi there i am a newbie to growing, i have a 7 litre homemade dwc system and am wondering how many plants i can put in it, also when and how much nutes do i need to put in this set up for an autoflowing plant/s.
Any help will be much appreciated