- Clear Safe pH Increaser - Plastica Pool Spa Chemicals - pH Plus - Soda Ash for increasing the pH of hot Tub /Spa water - Fast acting - Can be used with all types of disinfection control - Next Working Day Delivery - PRODUCT INFO - DELIVERY - RETURNS DELIVERY: Relax Hot Tub pH Plus is sent out on a next working day service but all standard deliveries will be within 5 working days RETURNS: Relax Hot Tub pH Plus can be returned unused, in original packaging, suitable for resale, within 14 days from date of delivery. PRODUCT INFO: Clear and Safe pH Increaser is used to raise pH level of your pool, spa or hot tub, it is an essential chemical to keep the water balanced and neutral, sanitisation products need this to work correctly and.
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