HI ABK ,going by the photo's it looks like you have just strenghtened the sides of the pond with rebar and concreted on to the soil, is this so and do you think that will be strong enough??
This is a voltage regulator for the pond pumps so i can alter the pump gallonage per hour just by altering the volts by 5 volts at a time. made by the same brilliant leccy Mr B.Aslin-Smith