Thanks to you all!.

The pond is not a liner pond. It is an old ski boat.. It holds water up to
the seam line between the top and bottom sections. That line is two inches
above ground level.. There's not a fountain or spitter. The kiddy pool
does overflow when it rains. I'm thinking maybe the plants in it block the
outlet back into the pond when it rains, so that the only place for the
water to go is over the top of the kiddy pool. . Four inches seems like a
pretty big drop, but I cannot find any other explanation. Probably we need
a bigger veggie filter kiddy pool or an additional outlet from it back to
the pond. Do you think that would help?

"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,