Join Date: Oct 2011
Location: Montgomery, Alabama
From my experience, nothing bad will happen to the plants, but it sure can make a mess in your water column. If you pull plants and move them around, do it slowly and carefully. Clay is super fine silt, and when suspended in water can make a red mushroom cloud of annoyance in your nice clean tank if you have a lot in the substrate and yank roots out quickly.
Plants love the iron from the red clay though.