Originally Posted by Tom D

I use a piece of PVC and support it at a safe level above the Magnesol. Then as I get closer to the Mag, I lower the tube carefully so I don't hit the Mag. When I am done, there is approx 1-2 inches of BD left above the Mag. I leave the Mag in the barrel till after 5-6 batches (it's up to you) then I scoop it out and leave the remaining BD in the barrel for the next batch. You don't have to clean the Mag out completely. It will settle to the bottom when you dump another batch in. As long as you have enough volume in the barrel to dump 35-37 gal of BD in, it doesn't matter how many times you do it before you scoop out the old Magnesol. The old Magnesol stays soft under the remaining BD.