I did something that I would assume would be close but I wouldn't be surprised if it didn't. I put oyster shells in water and extracted that water after spinning the water for a long time. I was thinking because water will carry nutrients away from plants when there is excess water that doesn't get absorbed and just keeps flowing down. Leeching is the process water carries nutrients down with it. So by causing a current to the water for a long time it should carry some calcium with it. Even though it probably won't work as well as that would. Also we have some for our cows.