Use a "hot tub rules" sign. A sign is proven and effective.
Size: 14" x 10" Material Type: HDPE Plastic Sign Verified Purchase
Size: 14" x 10" Material Type: Aluminum (40 mil) Verified Purchase
Size: 14" x 10" Material Type: HDPE Plastic Sign Verified Purchase
Size: 14" x 10" Material Type: HDPE Plastic Sign Verified Purchase
Good quality and quick shipment!
Great sign and it was shipped really quickly.