theres 2 barrels for a couple reasons,your right on more volume with doubles,but more for having the option to use one for plain water and one for any type of additives if i choose.like if i decided later im going to run coco or rockwool on the tables i will have options for feeding those differently then my organic stuff.with this setup i can also mix light nutes in one drum and keep the other water for my helper to use for hand watering when im gone.harder to fuck up my grow if he only has water to work with lol.i can just close a drum and put some tape on it that says do not open and its idiot proof.the one in the corner or on the right side is where ro water comes in so that one will be auto filled at all times so my help wont have to ever worry about running out of water like we always have in the past when i leave,he would go into panic mode about 3 days after i left.for now i just have ball valves on but i can switch those to master valves later if i decide to get crazy with automation,tryin to keep it very basic right now.pump does not have pressure switch,will be controlled by my phone through a hunter irrigation clock and a pump start relay which will also power up separate pumps within the tanks whenever the main pump kicks on just to keep things stirred up real well.theres also a few different spot along the system for me to hook up garden hoses so i can(and will) hand water every day.all the
floraflex crap is more for when im away,my helper can just lift some pots here n there and make sure things are how they should be.if not he can spot water stuff.veg room will be very similar but totally seperate system,barrel,timer,pumps.just a single 55gal for veg