Comments on:
Filter- Since you will be having shrimp in that tank, and I am sure you will want them to breed and have baby shrimp, I would recommend you keep that filter and add a pre-filter to the intake. Not only will this allow shrimplets not to be sucked up by the filter (which they will!) but it will also minimize the power of the filter.
Heating- If your room temperature is 72-77 then you don't have to worry about buying a heater for you tank
That is the perfect temperature for shrimp and most other things. The shrimp will happily breed and live in that temperature
Furthermore, a 50W heater on a 2g tank is overkill and will boil your shrimp and everything else in the tank.
