A little more than a week ago I bought two red plants a red tiger lotus, and a red wendtii. Knowing that red plants need iron I also decided to get a box of API's First Layer Pure Laterite clay substrate. I moved my gravel out of the way, put some laterite clay in, moved my gravel over that, and planted my plants. During the first week of planting I'm not seeing any expected shock symptoms but new growth from both plants. I was very surprised as to how well the clay substrate worked I only wish I could easily add it under my swords.