Recently inherited a hypoxic incubator and am tasked with setting it up. The manual that came with the unit has minimal information regarding the size tank of N2 I should be getting. Hoping someone here has experience using an hypoxia incubator and can recommend the size of tank I should be purchasing and general maintenance. Our CO2 supply is central, but N2 supply needs to come from a tank. This is the Caron Hypoxic CO2 Incubator 170L fyi. Thanks!