Because I got few angelfish started pellet after I dose the oztozin...The angel will start to nip or eat some of the left over particle they seem stress sometime but they eat the tablet after that I throw pellet in n they hungry for it I also dont know y. . After sometime I has alot of angelfish now all very healthy even 3 mth no water change due to oversea attachment and they was fed on pellet 3-5 times a day by my brother n maid. so far so good no white spot found....Even the majestic/six bar and regal angelfish start to eat because of this. Just to share not for lesson try on ur own risk !!!