Baking Soda to Raise Alkalinity in a 300-Gallon Inflatable Hot Tub: Exact Dose
Low alkalinity in a 300-gallon inflatable hot tub causes pH swings, corrosion, and irritated skin. This post gives you the exact baking soda dose per 10 ppm of alkalinity, walks through a full worked example, and explains how to add it correctly so it actually works.