Well, I had Hygrophila doing exactly what you describe. Without CO2 injection (wink).....just potting soil substrate in a 10gal tank. No flowers....but mostly cuz I was frantically snipping off the shoots as they crept INTO the light fixtures and out amidst my orchid plants. My geese LOVE Hygrophila. Betty Goetz _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member