all i say is do as much research as possible on drop eye, they all seem to get it... i have a theory of the hitting their eyes on tank lids when jumping but its just my opinion from my own silver i kept... good luck with one of the greats.
There are a lot of theories on causes of drop eye but none proven, my personal opinion is that they have no need to look up like they do in the wild where most of their food is in their natural environment, but in the aquarium all of the movement is to the side or below. Just my personal opinion after a lot of research
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