I have killed plants by using furan compound based meds. I was doing an extended bath, 9 days, with water change and redose every three days, 250ml per 10 gallon.
The plants didn't die until near the end, looked in the tank one day and everything looked like wilted spinach:icon_sad:
So, maybe a shorter duration is OK, but maybe not...
I killed an entire tank of plants (except annubias) using bifuran and the fish died anyway. Total mess and disaster. ugh. never again. I've got some left, but I'd only use an empty hospital tank if I ever dosed again