Quote Originally Posted by BigDave View Post
Higher flow will provide better heating than lower. The goal is to move as many calories from the collector to the pool. Lower flow will give a higher change in temperature across the collector but higher flow will move more of the available heat into the pool. Use as many parallel tubes as possible for highest possible flow.
Thankfully someone more knowledgeable chimed in, I'd have directed you to a slower flow with the system, but I do believe there needs to be a balance with flow rate to the heat transfer.