I also noticed the same this summer in my trout pond. More so in the evening and after feeding, both of which put the fish at or around surface. Ah, the sweet smell of success. If it's not accompanied by dead fish then I'd say good on ya. It's a bragging right we have all earned as pond owners. If my wife can smell fish through the kitchen window, while cooking turkey, while I'm ice fishing with the boys, then I've done my job.
