Magnetic stirrer - Wikipedia
Jun 18, 2008 · As for volumes, with gelatin present the viscosity makes it difficult to go above about 500 ml with good stirring. So, I use graded magnetic bars in 2" down for 500 ml down to 100 ml volumes. Above 500 ml, I don't use magnetic stirring. Instead, I use a prop mixer, but I can add to the mixing at the bottom by using a prop mixer and a magnetic stirrer.