i would like some input or suggestion on my problem. i have a flame angel with a popeye and i am sure it is not from am injury for it has it for a while now. a little bit of what my system is. 90g with 30g mixed reef with various wrasse and the lone flame angel. i have treated popeye on my yellow belly blue tang before but on a quarantine tank and treated with furan2 with success. now my situation is different for i am having a hard time catching the flame angel no matter what except if i tore down the whole reef which is not an option as of this time. now for those who have experience it, i am thinking of just dosing (just thinking) the whole reef system but i have no idea what effect will it bring to the whole system. i know that the medicine will kill both the good and bad bacteria in the tank. but i have no idea what will the effect be on the reef itself. my reef has sps, some lps and tons of zoa and paly. any help is appreciated.