+1
It all depends on the fish you want to quarantine. For a dish no larger than say a goby (4 inches)..10g should be fine.
I just have the 29g setup, so I don't think that I will be getting anything too big. Good that make me happy.
BTW I did the water tests and the levels look great. I actually droped my Nitrates with the big water change. But I still want to keep an eye on everything.
I also have a question on lighting, but I think that I will start a new post.
Thanks.