I was about to start a similar thread. Just got my new aerator set up and I'm running 600 ft of air hose to my pond. Currently just sitting on top of the ground but planning on burying it soon. I've run regular 3/8 in 300 psi air hose I bought off amazon. I'm wondering about burying it. Do most people run it inside of conduit or PEX for protection? Also thought about just pouring sand inside of the trench to protect from from roots and rocks before back filling it.