2.5ghz fpv uhf antenna

How important is separation with 433mhz rc rx and 2.4 ghz video tx? I know that separation is key with 1.2ghz video and 2.4ghz to minimize harmonic interference, but I am wondering if the same applies to the aforementioned system. I am only getting about 200 meters with my 2.4ghz 500 mw video...