Greetings. Our 2 acre 20’ deep pond is under construction. Based on the difficulty I have had clearing other and old turbid ponds on our property, I’d like to start off right with this new tank. Our soil is has a lot of clay. Based on my research and testing, gypsum works but temporarily and we still lack visual depth of 18 inches. I would like to try adding gypsum stone but I cannot find any in Tarrant, Jack, Parker or Wise County Texas. Would limestone be the next best substitute? Or does anyone know where I can get gypsum stone? Thank you all in advance.