New Plaster is 6 months old (quartz colorscapes dark gray). Having to add MA everyday to maintain PH at 7.5. Adding baking soda once a week to maintain TA at 60-70.
Starting to see some white stains on plaster and overall color of plaster has changed. Could this be result of calcium? My TA tends to stay closer to 60 on average. Is there any harm in keeping TA at lower end?
These are my current readings.