>I would like some more information but to me it sounds line you made a major change in something (lighting?) about a month ago. The lights were switched from 2 x 10,oook to one each 10,000k and 6,700k. Additionally, I did run out of fert solution and the CO2 for that tank went dry. Both happened while I was out of town for thanksgiving when I bet they were overfed. I just recharged the CO2 and began the ferts again yesterday. So...too much food and sudden loss of CO2 and ferts. >To move forward, I would suggest resetting the tanks with several large water changes and removing most of the dead/dying material Good suggestion. I did this yesterday and will do a couple more major water changes this week. _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member