Firstly Deb is correct that the conversion for grains to ppm (mg/L) is 17.1. My memory is getting foggy and I should have double checked before posting. I will edit my post above and fix my error.

I think Deb is probably correct about algal decay in sample transet and it caused increased ammonia. I think ammonia concentration is okay in Gators pond. To check if it will support fish put a small fish or two in a minnow bucket and put in the pond to be stocked. If fish live for two days pond is okay to be stocked.


aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management