No, that makes sense. What kind of sod is it? It would need to pretty high to be of much benefit. I still doubt that lightweight fertilizer would hurt anything. The grass should absorb it and then rot. The rotting will add a little bit to the nutrient load but shouldn't be appreciable.

I don't worry about grass. I just toss some brush in shallow areas.

It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.

Without a sense of urgency, Nothing ever gets done.

Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP Grandpa