I took my yellow tang out of my tank, (he was swimming funny, and seemed to be scratching, and was not out in the open swimming the entire day, so i know something is wrong) I stuck him in my 33g tank to observe him better (there is no rock etc) and i looked through my box of fish stuff, and i found a bottle of greenex, but i don't have the box it came with. Someone had given it to me. The bottle said to treat with one drop for every g, but to read the box for further instruction....well i can't! I did treat with the one 33 drops, but i don't know where to go from there. Does anyone have a box laying around? how many treatments do i need to do? How do i rid the tank of the medicine once i'm done treating? I have no carbon in the tank.