if this is a sterlet, im thinking more than 2 years, as with any other sturgeon, except beluga and some others that i forget
sturgeon are ancient fish, and theres a reason that theyre endangered in most areas
i takes years and years to grow out a sturgeon, they live for a very very long time
sterlets can take relatively high temps, but i doubt tropical, the problem is, they inhabit areas with a flow of oxygen rich clean water, so, if you can provide cold water with a very high DO, very clean and some current if possible, theyre not that hard
i prefer to view a fish in its natural habitat anyways
anyways, just my 2 cents
http://www.aquariacentral.com/species/db.cgi?db=fresh&uid=default&ID=0417&print_view=1
this place tells you what to provide, and says a 300g is adequate for a fullgrown sterlet
sturgeon are ancient fish, and theres a reason that theyre endangered in most areas
i takes years and years to grow out a sturgeon, they live for a very very long time
sterlets can take relatively high temps, but i doubt tropical, the problem is, they inhabit areas with a flow of oxygen rich clean water, so, if you can provide cold water with a very high DO, very clean and some current if possible, theyre not that hard
i prefer to view a fish in its natural habitat anyways
anyways, just my 2 cents
http://www.aquariacentral.com/species/db.cgi?db=fresh&uid=default&ID=0417&print_view=1
this place tells you what to provide, and says a 300g is adequate for a fullgrown sterlet