help

hi! i bought this hydroponic plant to place at the top of a fish tank (only roots in water)

im getting some mixed stuff on google about whether its toxic to fish or not im wondering if any actual plant people can help me out ?

some stuff is saying if only the roots are in itll befine, some says as long as nothing eats it everything will be fine im just stumped haha

i probably wont put it in at all but im

curious if anyone has an answer