Crazy Fish Love

I've had my Goldfish for several years now and apparently they're old enough to mate. I never gave it much thought until I heard splashing and thrashing in the pond last week. They chased and pushed each other around the pond and even pushed each other out of the water. They've knocked the water leveler out of whack so I manually add water now. I keep the water level a little lower because you never know when that crazy fish love will take them over the edge.