My mom has a large Gasteria Obtusa that I had been admiring for several years. This past spring, I noticed a few baby off-shoots in the pot and asked if I could have one or two. She brought them over and they both looked like the one on the left, above. It seems the one on the right is thriving (notice the bright green color and fat new growth in the center) while the one on the left is thin and the color is dull, it does not seem as firmly rooted either. I have been using a fertilizer on both of them, hoping it will help the skinnier twin look a little better, but still no change.