Hey there! My Dad is all excited about me building a pond, so he has been watching a bunch of youtube videos and such. He said he saw somewhere that you should really put down a good insecticide underneath the underlayment to discourage fire ants and whatnot from crawling under and tunneling around under the pond. This scares me a little. I'd think you would have to be very very very careful to not get any of it on your shoes or up on the water side of the liner. Thoughts?