Monsanto's engineered crops have been known to cause various organ damage (liver and kidneys) also in rats in mice which they must be testing on. Pesticides in crops that have caused mutated insects, and "superweeds" resistant to herbicides. Involved in creating aspartame which has been linked to brain tumors and other health conditions. But you are worried about how people keep their polys in a tank without decorations????? REALLY???? How about you worry about some real problems and not whether someone has substrate or plants in their bichir tank.