I had an instance of whitespot 2-3 weeks go which took my Clown Fish and Royal Gramma. I treated with Octozin for the required 3 days. Since I don't have a quarantine tank (or able to catch the Royal Gramma) I was forced to treat the main tank. I was advised that this was "reef safe" so my corals etc would be fine. Well both fish died but my corals are fine and doing well. Question - would this treatment kill the bacteria in my bio filter? Reason for asking is that my Nitrates used to be at 5ppm, but after the treatement, this has doubled to 10ppm. I was thinking of adding a bottle of "reef start" (forget the supplier name - tropic something as far as I can remember) to replensih the bateria just in case. Your thoughts?