"Pam Gibbs" gpaktatnetdoordotcom wrote in message
...
Today we had a couple of hours of heavy rainfall, and when it stopped
raining the water level in my pond had dropped four inches.

I know that water moves through the kiddy pool part of the filter very
slowly, and that it stays so full that lots of rain will cause it to
overflow. My question is, when the kiddy pool overflows does it just
spill
out the excess rain water or dies it also spill pond water too, and thus
cause the drop in the pond level?

I'm not even sure that question makes sense... Sorry,

I think I understood that.

Could be something very simple too. I've seen my pond fall after a rainfall,
but only if it has been windy too. Was it windy? Did you have a fountain
running at thetime?