I have a koi pond where the pond is automatically filled from city water and the water level is controlled via a float valve. This all worked well for a long time until the recently when the float valve failed and the pond overflowed overnight. I'm looking for a wireless high-water level detector, preferable one that can notify me via an email or text, and, if possible, costs less than $100. Obviously it has to be able to be used outdoors. Does such a device exist?