How come every time it rains, my pool has bunches of earthworms on the bottom of it?

Question

Get's tiresome constantly cleaning them out! Can't figure out why they do that!

Answer 1

I think it's because when it rains hard, many worms come out so that they don't drown underground. When the rain stops, they start to dry out (which they can't tolerate for long), and they seek moist surroundings again.  If they have wandered near your pool while it was raining (especially at night), they sense the moisture from the pool and head for it, eventually falling in and drowning.

Comments

Geez it's a dang mess!

---

I'm not sure, but maybe if you put edging between the ground areas of your yard and the pavement surrounding the pool, the edging would act as worm barrier? I don't know how high it would have to be, maybe 2 or 3 inches?

Answer 2

That is really a mess, all the more that earthworms are very important for gardens, agriculture, lawns, natural vegetation and even for other useful purposes.

https://www.todayshomeowner.com/earthworms-taking-over-driveway/

And about the earthworm, a most appreciated bait for fishermen:

https://en.wikipedia.org/wiki/Earthworm

Answer 3

They come out after it was raining.

Answer 4

Maybe, the rain water itself contains the egg or small worms. check whether the water from outside enters the pool during rain. Check the nearby pools have the same issue or not.

Comments

The guy that does my pool work says he sees it in many pools on his route. These are full grown earthworms. I know what I'll be doing today!

---

@Dan

No, not the rain water, but the ground and the water flooding the ground. Earth worms are not parasites, living in digestive systems of birds and other animal species, like tapeworms, for instance.