When Zoey goes to the stream to look for bugs, she gets a surprise - they're all gone! And so are the merhorses. What's going on in the creek? Zoey traces the trouble to a car wash: the soapy water is going into the storm drain and running into the stream, polluting it. When Zoey puts a stop to the car wash, the stream clears and the bugs - and merhorses - return. ( )