Thanks. I would design it with valves and couplers to remove the entire center section with just a rotation of two fittings. The gurgle buster couldn't flow enough water as I purchased 1" ID PVC for the drain and I think even w/ 12 1/2" holes it didn't seem to flow enough, I could be wrong but water seemed to struggle to stay below the highest row of holes which lead me to believe I needed more flow.
Dave