setting up a quarantine tank

[afreshoutlook]

Greetings,
Beginners mistake I have added a Gramma recently purhased & now comes the "ich".
My question, I have heard of two differentways to set up a tank. #1 you start from scratch, clean water, salt, h20 movement & filter, same temp, some hiding spots and add the ich formula,,
#2 same as above but have L/R

Soooooooooooooooooo which is the proper way?? Also do I have the salt & heat the same as mymain tank??

Also, as I can only see that one fish has it now, what about the others?? do I also add tem to the quarantine?

I have a 33 ready to go with water & salt & heated, with a fluval filter & air stone.
Thanks
Dwight