filtration would depend on ur stock. on my 120 i have, a FX5, Eheim 2028 pro 2 and a 1200GPH powerhead. - im not saying u need this much.
temperature would depend on the rooms ambient temperature. on my 120 i have a 300 watt inline heater.
the bottom line is, u need to provide, much, much, much, more detail in order to get a better response.