I have a frag tank setup with a HOB overflow, about every week or so I take the sponge filter out of the fragtank overflow and there must be several hundred pods living on it, then I shake them out in a bowl of clean SW and then dump them into my DT... I would agree about the refugium as being a good source. I also have a 10g chaeto tank setup, it's just the tank, some LS a little LR, heater and a blue damsel and a 2x9w coralife light. The chaeto grows like mad, started off with a golfball sized clump and now it's the size of a basketball. I feed the tank frozen cyclopeeze (sp) and it's overrun with pods. I plan on using these pods to establish my new 125g reef.