I began using Optimal last season in my pond. Previously, I tried Purina Aquamax Sport Fish MVP with great results. I switched to Optimal because they delivered right to my door. I will be going back to the Purina MVP even though I have to drive to a feed store to pick it up. I actually liked the MVP better as it has both floating and sinking pellets and has a mix of larger and smaller pellets. My fish inhaled it. I also used the Optimal hand throw for my catfish. Anybody know of a large hand throw type pellet since Optimal is no longer in business? Thanks.