So I bought a setup that had a bunch of nems and some corals already existing. I didn’t want to use the existing rock/sand/water but had to under the circumstances. Now the tank seems to be cycling with a terrible Dinoflagellate brown slime that I can’t get rid of. Any old pros out there have any ideas?? I’ve turned the lights off and am doing water changes biweekly now. It comes back overnight. I’d rather be dealing with briopsis to be honest…(disclaimer, I don’t know if it really is Dino’s or not but it’s the only conclusion I know of that makes sense)