I picked up some corms in W-Mart recently and the instructions said to drop them in the aquarium and they would root on their own. I have just begun to notice that they have indeed rooted and look very nice. I was wondering if anyone else have tried them. They are located in the fish section and are called Dwarf Lilly-Hybrid Ulvaceus They were about $2.50 for 5-6 corms.