I buy mine at the local Petco. You can also get it from www.thatpetplace.com They ship it once a week. You mau need to get more up to date details on their shipping policies.
Hi,
I feed my fish with it and I purchase it locally at nearly any of the LFS's.
IMO, it's the best frozen of all the Ocean Nutrition. Don't know about feding the sandbed, however. Does a good job for fish and corals, though.....