There's drawbacks either way .

My reason for 1 controller = simplicity .
But if you grow more than 1 strain it's hard to keep everybody happy as far as nute requirements .

I used 3/4 in. fittings / plumbing and found that I can recirculate the system so fast that the root systems get pushed over to the outlet side of my buckets and then the system can't recirculate anymore So find a happy medium as far as recirculation speed .

I spin my inner buckets 90 degrees everyday too or roots still grow down the tubing and plug shit up . I think the only way around that is like 2in. pvc drains like Shaggys crazy system .

Good luck man .
Crispi :stoned: