Although the water is still tacky when touched and it shrank, I decided to complete the landscaping. A river usually has things floating in it so if bits of landscaping end up on the water or settle to the bottom will be okay. I don't want to redo it all right now.
However I will tell my parents that if if becomes a problem will redo the bottom.
The water did get in the area of the paddle and my husband was very sweet to stay up all night and keep it from freezing up.