Does anyone have any information about Acidity and nutrient uptake. Specifically, does very low ph < 4.5 ( co2 ~ 25ppm, KH ~1) have an effect on plant/algae metabolism? Ed Hengel Carmel, NY _______________________________________________ Aquatic-Plants mailing list Aquatic-Plants at actwin_com http://www.actwin.com/mailman/listinfo/aquatic-plants