having trouble I’m about year & half into tho hobby and all my fish died 1 by 1 last couple days all my water is good - all is 10 - cal 460 mag -1200 ! I have 25 nano all in one currently runing activity carbon , fliter floss bio Media - fish have fine for over year definitely some kinda ich or something I saw spots on my fish started dosing polyup labs medic was on day 9 of treatment all my fish died not sure what I should i do don’t wanna restart kill all my corals please help !