In my experience the purple will slowly turn to green without CO2. On 5/11/09 9:55 PM, "TOD SODAWASSER" <sodabogger@comcast.net> wrote: > I'm not sure if you must have it > or not. I do have pressurized CO2 > on all our tanks. Does anyone know > if it is a must? Well you could try some it's free and then let us know > how it does without. > _______________________________________________ > GSAS-Member mailing list > GSAS-Member@thekrib.com > http://lists.thekrib.com/mailman/listinfo/gsas-member _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member