Acclimatizing moray eel - help needed

[tuajia]

Hi all, hoping for some help. I happened to pass by a certain famous freshwater LFS and to my surprise (and a bit of horror), I saw this moray eel for sale (sorry for the bad photo)

https://en.wikipedia.org/wiki/Fimbriated_moray

According to my experience and research, this moray should not be capable of living in freshwater in the long run. So i quickly bought it and am currently acclimatizing it via overnight drip method to my brackish moray tank. I have done several times before for all my brackish morays (i have both gymnothorax polyuranodon and gymnothorax tile). Hopefully he survives the night!

I now have 2 options. Either I

1.) let it live in my brackish tank and hope he can tahan, as I read that they do live in brackish from time to time(SG 1.008) or

2.) Acclimatize it back to marine and put into my FOWLR

Any bros have experience acclimatizing a fish back to marine?? I have no idea how long it takes and I don't want to rush in case I end up killing the poor guy. Appreciate the advice, thanks!

[illumnae]

You can acclimate upwards no more than 0.01 to 0.02 salinity daily till it reaches desired salinity

[tuajia]

Thanks for the info bro. Fingers crossed!