Hey guys after reading several posts and doing math, and now having a major headache I am going to try the gypsum for clearing dads pond. I am still a little confused on how much you should use. Dads pond is just over 2 acers in size and 16ft deep. Shallow to the north end and is tear drop shape. I feel like this would be a better thing to use over alum. For the simple fact that Gypsum is PH netural and that I dont wanna kill the fish while using Alum for the first time since you can have a huge Ph level swing in it. Now I have read in a post that some guy called there local coop ordered 5 tons of it and have the local fertilizer spreader come in and spread it onto his pond. Would that be the best method to do that with or is there a better way to make sure you have a good mix?