When you have more than one or two buckets that are not connected or dont have a drain valve, its gonna be a pain in the ass to drain and refill. Its very easy to make a 4 bucket recirculating system, but if you dont wanna do that I suggest having some kind of way to drain the res w/o having to remove the plant. Its gonna stress your plant and your back.

hope this helps


Ohh and if you just started using hydro, use the GH 3 part. And you will want as much O2 as you can get on those roots. If you dont have enough oxy in the res its gonna make you vunerable to root rot.