+1It to me would seem to small to be a quaranteen tank. Ideally I thought some around 5 gallons would be better for a tank required considering the size of the fish and number of you may at any time need to keep in quaranteen. Even then 5 Gallon to me wouldn't be enough.
I am in process of getting a 20 Gallon for my quaranteen just in case of larger fish.
I would plant this up as a nano and try some new plants out in it you haven't before.
Kind Regards,
Adam