how many times a hour should the water go through the sump?

[mr.wilson]

Originally Posted by StirCrazy

recirc skimmer are usaly fed slow Dan, it would work but not sure if it would be any better.

Steve

As bandit pointed out, our goal here is to move water from the display tank to the sump and back for the purpose of filtration. If the filtration only requires a slow throughput, then that's all we need to give it.

If your recirculating skimmer needs 300 GPH throughput, it doesn't matter how big your tank is, you need to install a sump return pump that delivers 300 GPh to the display and subsequent sump/skimmer.