when I had my 30 set-up I made a small, 4"x7"x6", in-tank refugium out of acrylic I got at Home Depot and used PVC
cement to glue it together. I put a little Fiji Mud and some fine sand in there, threw in a bunch of cheato and within 4 weeks it was teeming with pods
that make their way out of it and into the tank proper. I had a small fountain pump mounted underneath and holes drilled in the opposite side. Worked great.
one other option is too create a safe zone for them. I have seen people use strawberry baskets filled with rubble and turned upside down on the sand. Then seed it with pods
and the idea is that they will have a place that fish can not get to them.
Personally I had much better luck with the in-tank fuge.