new tank is 36x20x20.plan is to filter with eheim2071 x 2 or 2217 x2.whicch model is better do you think.also,looking at the aqumedic 1000 co2 reactor,is there better alternatives for this size tank and would I be better off running the reactor from a seperate pump.basic ? Iknow just trying not to make expensive mistakes.help apprieciated.