Before I learned that the elodea I had was not hardy, I had plenty in rubbermaid bins cheap from Fred Meyer/Home Depot etc. No filtration, no heat, with natural light (outside). So if all you are doing is keeping elodea alive or propagating it, the requirements are minimal. In the process, I also learned that java moss is fully hardy here (grin). Betty Goetz _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member