Now if we can get it to pull from the pond with an empty tank.
you wont be able to until you get that vacuum line hooked up to the pump in a manner it doesnt get into the engine or get yourself a little 12 volt vacuum pump or a diaphragm pump with inlet and outlet check vavles.it wont be as fast as if it was using engine vacuum. for the time being your just going to have to get a prime using some tank water.
glad to hear everything is working out for you.