If you use Prodibio additives for your reef, you know that they have closed and ceased production. There are rumors that someone may pick up the brand, but there hasn't been a lot of traction there. That said, if you are looking to stock up, now is a good time. BRS has them on clearance anywhere between 70-80% off. Given that these products are sealed ampules, there should be a decent shelf life.
Just an FYI for those that use and like these products. https://www.bulkreefsupply.com/brands/prodibio.html
Just an FYI for those that use and like these products. https://www.bulkreefsupply.com/brands/prodibio.html