Where have the taddies gone.......???

My neighbour has a tiny pond which always has lots of tadpoles. This year they are still tadpoles- one or two have got legs but the weather is cooling down rapidly so what will happen over winter? We've heard of putting iodine in the water but have no idea how much.... anyone know?
We also have toads big and small but no idea where they breed! We also have slugs so large they would defeat even the biggest toad!

 

believe it or not iodine does work (i tried it) how much is hard to say, i ended up puttting in half a bottle

 

I have seen tadpoles overwinter in the pond as tadpoles, they have a flying start the following year the theory is frogs usually spawn in the shallows or in ponds that have a shallower edging the water at the edges the water gets warmer in summer the taddies develope faster, garden ponds tend to be a bit deeper and cosequently cooler hence the slower developement.Iodine stimulates the hormones that help tadpoles to develope into frogs its recommended that only a few drops are used.

 

Thanks for that advice Walnut, sadly after having our pond full of spawn, we never had one tadpole, this was most unusual - next year I will add a few drops of iodine to the pond.

Brandy