Again there are alot of people even on this fourm who have had it not work at all or for it to work but it comes right back and for it to kill coral not just myself so again thank you for trying to help but its not the end all be all you think it is or as safe as you think and if your going to recommend it you need to tell people to do a test in a separate tank first like I did to find out what effects its going to have if I would not of done the test I would of lost most of my coral and would of been left with only the bryopsis as it had 0 effect on it also just so you know bryopsis is a general term as there are several types of bryopsis some its works for some it does not