I have an unheated tank here at work with Endler's livebearers. Typically the temp is pretty uniform...about 72. I have co-workers who have kept honey gouramis, neon tetras, Amano shrimp, wild-type guppies and platies in unheated tanks. The plants do fine as well, but we do mostly low-tech non-C02 injected tanks and have mostly cheap stem plants, java moss and java fern. Betty Goetz _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member