I have a 20g with a 40g sump. Over 100lbs of LR total in the system.

Just thought I'd rub it in.
I don't think the sump is defeating the purpose. I believe it is helping to provide excellent water quaility as well as provide a huge place for the pods to breed. Everything is healthy. Tank has been up for a couple of months. Plan to add a 20g gravity fed refugium next month and then maybe even in fish by January. Time will tell. I can count over 100 pods on my glass any day of the week. System rocks.