yes they can indeed.
i have 4 platy's 4 red eye tetras and 6 cardinal tetras.
just makre sure you get atleast 6 and have some plant coverage in a corner or so cus they can get nippy when afraid or sense somthing wrong.
can i suggest getting cardinal tetras instead, they are much more brillian!
most lfs will have a variety of tetras, see what you can find.
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