Aquarium Door

i put a door on my aquarium so the fish could come and go as they please although the idea might be scaring them it's not like i made it screened if they just barely open it that will help to stem the flow i know the goldfish are all hoping that the guppies don't treat it like a swinging door i'm sure they'll get used to it in time as we all do things in life and when they do they'll come to realize above all else my genius mind