
Leisure Time Spa Down | pH Decreaser
Leisure Time Spa Down is a fast-dissolving granular pH decreaser formulated for spas and hot tubs. Active chemistry: 95% sodium bisulfate — a dry acid that safely lowers both pH and total alkalinity when readings drift too high. The mirror-image counterpart to Spa Up, and together the two products handle every pH correction a hot tub owner will ever need to make.
High pH is one of the most common — and most overlooked — spa water problems. When pH rises above 7.8, three things go wrong simultaneously: chlorine and bromine lose effectiveness (chlorine at pH 8.0 is less than half as active as chlorine at pH 7.4), calcium and minerals fall out of solution and form scale on heater elements and jets, and water turns cloudy or dull as suspended particles refuse to coalesce. Many owners spend weeks adding more sanitizer to fix what is actually a pH problem — and the sanitizer keeps disappearing because the underlying chemistry won't let it work.
Spa Down corrects high pH quickly and precisely. The granular dry acid dissolves in seconds with the circulation system running, and a small ¼ oz. dose per 500 gallons typically lowers pH and alkalinity in measurable, predictable steps. Used as part of a weekly balance check with a quality test strip, Spa Down is the essential second half of any spa owner's pH toolkit — and significantly safer to handle than liquid muriatic acid, which it directly replaces.
Leisure Time®
Leisure Time Spa Down is a fast-dissolving granular pH decreaser formulated for spas and hot tubs. Active chemistry: 95% sodium bisulfate — a dry acid that safely lowers both pH and total alkalinity when readings drift too high. The mirror-image counterpart to Spa Up, and together the two products handle every pH correction a hot tub owner will ever need to make.
High pH is one of the most common — and most overlooked — spa water problems. When pH rises above 7.8, three things go wrong simultaneously: chlorine and bromine lose effectiveness (chlorine at pH 8.0 is less than half as active as chlorine at pH 7.4), calcium and minerals fall out of solution and form scale on heater elements and jets, and water turns cloudy or dull as suspended particles refuse to coalesce. Many owners spend weeks adding more sanitizer to fix what is actually a pH problem — and the sanitizer keeps disappearing because the underlying chemistry won't let it work.
Spa Down corrects high pH quickly and precisely. The granular dry acid dissolves in seconds with the circulation system running, and a small ¼ oz. dose per 500 gallons typically lowers pH and alkalinity in measurable, predictable steps. Used as part of a weekly balance check with a quality test strip, Spa Down is the essential second half of any spa owner's pH toolkit — and significantly safer to handle than liquid muriatic acid, which it directly replaces.
Leisure Time®
Original: $9.99
-65%$9.99
$3.50Description
Leisure Time Spa Down is a fast-dissolving granular pH decreaser formulated for spas and hot tubs. Active chemistry: 95% sodium bisulfate — a dry acid that safely lowers both pH and total alkalinity when readings drift too high. The mirror-image counterpart to Spa Up, and together the two products handle every pH correction a hot tub owner will ever need to make.
High pH is one of the most common — and most overlooked — spa water problems. When pH rises above 7.8, three things go wrong simultaneously: chlorine and bromine lose effectiveness (chlorine at pH 8.0 is less than half as active as chlorine at pH 7.4), calcium and minerals fall out of solution and form scale on heater elements and jets, and water turns cloudy or dull as suspended particles refuse to coalesce. Many owners spend weeks adding more sanitizer to fix what is actually a pH problem — and the sanitizer keeps disappearing because the underlying chemistry won't let it work.
Spa Down corrects high pH quickly and precisely. The granular dry acid dissolves in seconds with the circulation system running, and a small ¼ oz. dose per 500 gallons typically lowers pH and alkalinity in measurable, predictable steps. Used as part of a weekly balance check with a quality test strip, Spa Down is the essential second half of any spa owner's pH toolkit — and significantly safer to handle than liquid muriatic acid, which it directly replaces.
Leisure Time®




















