Our 1500 gallon pond is outside our dining room window. To feed them, I shut off the pump/waterfall. This alone brings them to the surface. If they're particularly hungry, they'll start mouthing. I'll then toss in a 5 minute dose of pellets. If I approach the pond outside, they go down and stay there. I've considered feeding them at water's edge, but like the safety factor of them diving at perceived danger. What is your approach/belief in this regard?