Put the gypsum in my pond this weekend. Not happy with the way I put it out. Started off mixing with water and throwing the water out. That was time and labor intensive. Went to just broadcasting (small pond). After it was done I noticed along the edge where I had dropped some that it had melted but was in little piles. I'm thinking the bottom of my pond has a bunch of little piles. Don't see how this is going to mix with the water.