Home » Octomarine Products » Pool & Spa Treatments » pH-Plus pH-Plus pH-Plus raises and stabilizes the pH value in your spa water. The correct pH value is the basis for all water treatment. To enhance the effect of all care products, the optimum pH value should be between 7.0 and 7.6. Contact Us About this Product Similar Products Bordnet®Pool & Spa Treatments Calcinex®Pool & Spa Treatments SuperklarPool & Spa Treatments Pipework CleanerPool & Spa Treatments Product Your Name Email Address Phone Comments 11 + 12 = SEND