Do ziplock bags break down in tank water?

[hecks220]

i would like to say i was hiding something, but i'm not i've put sponges in them and used them as plugs in my filtration chamber. It restricts the flow directing the water more at my media. It is my fowlr, and not my reef so i'm not going to worry. we store our food in in anyhow, and considering i won't be around in a few hundred years to watch them break down, i won't worry!