i have Transparent Nylon thread, and regular nylon thread, just tie it down tight, and then on the bottom part, tie all the lines of thread together to make sure they're tight... and just tie everything together to make sure its tight, and u can get 100-300yards for like $.72 and when its damp, it is VERY EASY To tie tightly, i use hairnet and then the thread for extra insurance, and just tie everything together numerous times...