I live in Auckland New Zealand. I have been growing Chia seeds in bowls with just water. I noticed after a couple of weeks, these white / transparent worms appeared in the bowl. It seemed that they came out of nowhere? I have seen them crawling in my bathroom before. And the really big ones can get up to a 2-3 cm, so they can't possibly be drain fly larvae as they can grow to a few cm? I also did not see any drain flies nearby. I wonder what type of worm are they? I hope they don't come from tape water, because I have been drinking from it directly.