Answer by
idiotjones (705)
"Brackish" water a greater salinity than fresh water but less than seawater. This is NOT a measure of pH, which is a measure of acidity/alkalinity. Nonetheless, brackish water is generally in the pH range of 7.5-8.5, which means it is slightly alkaline. If you want to raise this pH level further, add a base such as sodium hydroxide.