Nice grow bro!!
Here is a pic of the res / control bucket.
Also a pic of a pump you can use easily with your current grow, it is what I am using now. I just like to circulate the water a little...and it makes draining / filling the system easier.
To circulate you can just put a line into the rers., and a line into one plant bucket and pump a little bit..It mixes up the solution enough (IMO)....Without doing that it seems like the PH and PPM are different in the res / flower buckets. It is probably not necessary but oh well...It seems to stay very stable so I am sticking with it.
The 1st pic is my res / control bucket
The second pic is the pump...The pump costs $10.99 at ace hardware by itself, and with the kit is like $15.00.
(I am going to get a better / permanent puimp...but for 10 bux fuck it, that one will be ok for right now.)
Talk to you soon!