Pool in the Tropical Realm

With all them coins at the bottom, I can't even see part of the floor of the pool. I wonder if it is a build up of coins from since Tropical Realm has been opened (or at least since the koi). I wonder if the zoo has ever bothered to clear it.

I wonder why it is so difficult to remove the coins from the pool? Surely that detracts from the immersion experience?

there must be a fair amount of cash in there! Why don't they haul it all out and build an aviary somewhere with the proceeds? Or at least a park bench or something.

Wow - at first I thought, "well, there are not that many coins in there" - then I realized that what I thought was a lot of pebbles were actually coins. Sure, a pool in a tropical house looks a lot like a wishing well...

There were koi in this pool once upon a time, but they didn't really take to their new substrate...