Yogre
Cheesehead Reefer
Warner Marine says that "the polymer used [EcoBAK] is not Polycaprolactone (PCL) that has been in use in other products like Instant Ocean's Natural Nitrate Reducer but another form of biodegradable polymer that shares the same characteristics and completely different than the polymer used in NP Biopellets."
Daniel, your link doesn't work. Looks like the censor-bot ***'d out the website's name.