Tadpoles by the Thousand!

By now I figured all of the tadpoles would be gone from the pool I provided for them.  Was it because I wanted to open my own pool?  Yes!  If I left them on the cover, they would still be there.  Ten to fifteen leave every night but it doesn't seem to be making a dent in the amount I still see.  Bob has taken to feeding them.  They eat two slices of bread on a daily basis.  He breaks it up and throws it in the water.  We both watch as they attach themselves to the bread and eat.  It is all gone in a few hours.  When will they all be gone?  Or will they be like the kids and stay forever?....  Stay tuned.