No it won't kill the plants, myxazin by waterlife and primafix.
http
/www.waterlife.co.uk/waterlife/myxazin.htm
http
/www.fishjunkies.com/Medications/pimafix.php
http
/www.waterlife.co.uk/waterlife/myxazin.htmhttp
/www.fishjunkies.com/Medications/pimafix.php