Get tank bred ones (usually the russian diamond sturgeons, acipenser gueldenstaedti) and save yourself alot of hassle. WC sturgeons just tend to be ALOT more finicky with water conditions and the like. Keep them in cool water only <72 F to be safe, and keep a powerhead or 2 on the tank at all times - they require high levels of dissolved oxygen. Juveniles, if properly cared for, grow astonishingly quickly, 1-2" a month is easily possible up to around 2' at which point they slow down. They greedily feed on bloodworms, brine shrimp, mysis shrimp when smaller - as they grow they graduate to larger foods such as earthworms, chopped fish/mussels, etc. This particular species reaches an average size of around 3' in aquaria, although specimens as large as 8' have been caught by commercial fishermen.
