Green water after chlorine is added?

Its just a little kiddy pool. About 31 inches high and 15 ft across. I only added a little bit. I dont hvae any measurements and would rather not buy a kit, since this is the last summer we will be using the pool anyways. Just wondering if there is something out there that can fix it? Anything that might be in my cupboard? lol

Usually means iron in the water.

Did you fill with well water? Or with water from OLD city pipes? (Nothing in the cupboard for this. Sorry.)