> CO2 additions can often >cause dramatic swings in the tank's pH that could in turn cause nutrient >lockouts. (so even if the nutrient is there, it may be unavailable for >the plant?) Wow! This is interesting and over my head. I need to learn this. I figured that so long as the pH was OK for the fish that it would be OK for the plants. Is this wrong? _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member