Alrighty - Day 13 and things are going pretty smoothly. I'm a little behind in putting my system together because I ordered the wrong size hole saw bit. It arrives today so figured I'd map out the plan until then...
1 x 13 gal reservoir with lid
6 x 5 gal buckets (Lowe's spraypainted black to lightproof)
2 x 5 ft 2" pvc
1 x 5 ft 1/2" pvc
1 x 1/2" pvc ball valve
1 x 1/2-2" T connector
12 x 2" Uniseals (requires a 3" hole saw)
1 x 1/2" bulkhead
6 x airstones (I have mediums)
1 x activeaqua submersible pump for sub or inline use (I got the 800 which is likely overkill for now)
My plan is to pH and nutrient in the 13 gal res and pull the solution through 3 pairs of side-by-side buckets. The 13 gal res connects to the 1st two 5 gal buckets from 2 separate exit points. Those connect to the next pair, and then those connect to the final pair through the same 2" pvc passing through Uniseals. When the solution reaches the end of each side, it runs through the 2" to 1/2" T connector and returns to the 13 gal res through the 1/2" pvc. The ball valve sits on this return line.
I think I need to consider a couple of ball valves between the 13 gal and the 1st set of buckets in order to be able to drain the system to clean the buckets when needed. If anyone has any suggestions feel free to chime in! Probably biting off more than I can chew on this one!