Haven't seen any local. I got mine off amazon. A lot of people rave about it but to be honest, not sure I would buy again. I have the block in my sump for my 125 gallon aquarium. It does absolutely nothing for nitrates and they claim the blocks do. My nitrates actually went way up. The block has been in the sump for 6 months, which is more than enough time for it to house anaerobic bacteria. Just my 2 cents.