I bought the kids a 12'x3' deep pool last year and they used it once then started going to my moms and since then its just been sitting until one day when i was in a rush and didnt have time to clean thye 4 fish i had. SO in they went and since then me and my uncle have been pitching a few here and there and now i believe there is 72!! is it a sickness? No the kids really like them and i have to admit we like watching them!