I've tried raising the temp in FW setups before with good results. Also, I could throw together a quarantine tank if need be. I have ParaGuard on-hand but i don't know if any ich med is truly "reef-safe". I'll probably remove them, treat for 2-3 weeks, and go fallow for 45-76 days (unsure).The sad thing about all of this is that people go fallow and still get ich a week later or even 3 days later. Keep doing research on here. It’s a cluster of contradicting information. People have success quarantining and not quarantining. People quarantine and the fish die in quarantine due to stress, but they don’t tell you that. Well the honest ones do. Anyway, to answer you initial question because you have no other option than your display you’ve got two options. Lower your salinity to .009, and raise the temp in your aquarium to at least 82degrees, OR/AND try some medication that won’t hurt your corals something like Herbtana/Paraguard. Some People will say it works and some say meds don’t work. There’s so much information. You just have to TRY something. It may work and it may not. Look for failure so you can learn what you did wrong and can learn from it.