If your trying to flush your plants I'd get Flawless finish that product works wonders , also for the PM you can get 99% rubbing alcohol put it on a paper tower and run the leafs that infected , this will take away the mildew and kill the bacteria, you may wanna consider diluting the rubbing alcohol because its super strong and if left on your leaves will damage them but if you wipe the mildew away and then wipe the leaf again with good clean water it will be fine killing away the infection . I hope this information helps you on your quest to becoming a grow master :D :D -Happy Growing!