That's what they meant... That's a no-no for almost any chameleon... The plastic casts a reflection which can SEVERELY stress a Cham out.. Which may be part of the explanation for the hissing and overall moodiness.. I suggest a mesh cage of about 18"x18"x36" at LEAST... Nothing plexiglass, plastic or other will do
She is a Vielded.
An its a proper tank that was bought when she was from the same pet store.