How cold? Will room temperature be fine? I have the heater on my geo tank off right now and hes in there with them, but its still probably 78 degrees in there. There is plenty of space and the lid is nice and tight. Its not a very big sturgeon, only about 3" or so, how small of a tank can he be in for now? My bf was told he wont grow more than an inch or so every year, is this true? If he needs a plain, coldwater tank, I have a spare 10 I could use but I dont want him cramped. The other fish leave him alone for the most part.
Sturgeon in a 10g should be a crime. Take that fish back to the store if putting that fish in a 10g even crossed your mind your in way over your head.