No 1/8 will not be strong enough 1/4 at least. Snakes not only weigh more but are able to apply far more force I have had a snake break 12 guage wire. I would figure 1/4 for the sides and if you were thing floor as well 1/4 or heavier. I would suggest plain PVC yes it is heavy too (not expanded which is lighter and has air bubbles through it) it is tough and cleans easily it also is easily heated through as well.