Matt,
Thank you for your post. Our white feeder shrimp are intended for feeding purposes. You may certainly keep them in a refugium while waiting to use them as feeders. We apologize, as we do not have any information available on spawning/breeding these specimens in a refugium. While they are not normally cannibalistic, it may be a concern when the shrimp are kept in a smaller area such as a refugium.
We hope that the information provided proves beneficial in the care of your aquarium. If we can be of additional assistance, please contact us at 1-800-334-3699.
Sincerely,
Mike S
Live Aquaria.com