The refrigeration issue is a problem between the distributer and the retailer as well. My LFS gave up selling the product because of the unreliability of receiving viable shipments. I experimented with the product about a year ago, and it worked as promised. But I have also had good luck using a product called Stability by Seachem, and it does not need refrigeration. A hand full of gravel or some filter material from an established, healthy tank is still the best way to go in my opinion.