I was actually going to move all the water features over to the mulch beside the patio, but one of them was too heavy (full of rocks) to move so I just cut the linoleum to go around that one whiskey barrel and left them all on the patio. There should be no chemicals anywhere....I don't use anything like that outside....it would be possible on the patio since it's been there for a year, but I just put the linoleum down... and I haven't had anything on it except water. I wonder if there's something in the linoleum itself ?? like a glue or something ? I've had the worst luck with nature the last few days ...I found one of my hummingbirds dead with his beak stuck in one of the feeders I may go ahead and try to move everything again tnite into the mulch.....and just have to scoop all of the taddies out of that one whiskey barrel.......