honestly i haven't seen any sharp fish tank things are you sure?
for stuff, it is personal preference, so I'll tell you what i would get for a empty tank, doesn't mean you have to do exactly that

Pet Supermarket
or Pet Supermarket

and one of those Pet Supermarket

heating pad only on a glass on side, NOT under tank and NOT on a back wall as it is has foam background.

you need as well that Pet Supermarket
and that Pet Supermarket
and that for feeding Pet Supermarket
and that ( you should have something like that for your fish tank) Pet Supermarket