spraying serenade on plants while there on the table got a question

i have all my plants tied up right now on the flood table..before i would remove them and spray the serenade on them..

does it matter if i spray these while on the table? obviously its gonna drip and end up back in the resavoir...is this a problem? i have some spot treatments i need to do today

i planned to do this about 30 minutes before lights off tonight so it didnt fry the leaves and buds

never used serenade, but i've heard about people using it almost all the way to harvest. that being said, not sure if it'll fuck up your res water or not, but they do absorb what is applied in foliar form as well, if that helps your decision.