Okay, you may have seen gardens on driveways before. It’s a good choice for me because I can partially bury the nutrient reservoir off the side of the driveway.
Lowering the reservoir into the ground will lower the entire Dutch bucket setup, helps about 12 inches for me. The second benefit is it may keep the nutrient solution cooler, and that’s a plus on our Arkansas days which easily hit the 100 degree F. mark. I mainly did it for the purpose of lowering the setup entirely.
How about the pump. It’s an Eco Plus 264, but pumps 290 gallons per hour, go figure. It’s supposed to be able to lift a maximum height of 6.5 feet. I found a very interesting fitting, it has an air inlet and sucks air into the pressure stream, causing the nutrients to enter the Dutch Buckets with a stream of air bubbles as well. No one has mentioned this, so it may be something new. I’ll show you a pic of that fitting that came with the pump from Greners.com. I bought three pumps at 19.95 each plus shipping of 12 bucks or four bucks a pump. I thought it would be horrible to have a pump go out and have no way of watering them until another arrived. BACKUP seemed like a good idea on the pump.
The Reservoir is 27 gallons, and I elected to follow Bobby Smith at MHPgardner on youtube.com. I picked up on the benefits of putting the reservoir partially into the ground. I still have to backfill mine but that will be easy after digging those blasted rocks out along with the soil.
Tomato Heaven 
Are you still using the 27 gallon Commander as your reservoir? Realizing you submerged this to help combat the Arkansas warmth, has this been satisfactory?
Yes, two of them from Lowe’s, black tote with yellow lid. This is coupled with two grommets rubber, and a 1/2 inch pvc tube like I use in the dutch buckets for the drain line and elbo, same thing.