This was a server-side issue. When I moved the server to a different platform, I didn't check the tide calculator to make sure it was still calculating. I fixed this.
I added the following tides locations:
Current Configuration:
Tide Slot 1 Location: Port Manatee, Tampa Bay, Florida
Displayed as: Port Manatee, Tampa Bay
Tide Slot 2 Location: Safety Harbor, Old Tampa Bay, Florida
Displayed as: Safety Harbor, Old Tampa Bay