Description
FreshWater Concentrated Chlorinating Granules in the 2 lb size is the right starter for new chlorine-program spa owners, occasional users, and smaller spa setups where a 3.5 lb container would sit half-used for too long. Same fast-dissolving, pH-neutral sodium dichlor formula as the larger size — just sized for a more modest commitment.
Dichlor is the chlorine specifically formulated for hot tubs. Standard pool chlorines — calcium hypochlorite (cal-hypo) and trichlor — are designed for outdoor pool volumes and chemistry, and will damage spa equipment over time. Cal-hypo raises calcium hardness with every dose, eventually scaling heaters and salt cells. Trichlor is acidic, driving pH down aggressively and corroding spa interiors. Dichlor is pH-neutral, dissolves quickly in spa-temperature water, and is the form chlorine should take when added to a residential hot tub.
Two situations where the 2 lb size is the better choice than the 3.5 lb:
- New chlorine-program owners who want to try the FreshWater chemistry program before committing to a year’s supply
- Salt System, ACE, or Ag+ Silver Ion owners who only use chlorine for periodic shock — not enough volume to justify a 3.5 lb container before it ages
- Smaller spas, plunge pools, and inflatable hot tubs with lower total water volumes
- Vacation homes and seasonal-use spas where the tub isn’t running year-round
For households running a chlorine program full-time on a typical 400-gallon spa, the 3.5 lb container is the better per-pound value.
Pro Tip: Target sanitizer residual for a chlorine spa is 2–3 ppm of free available chlorine. Higher than 5 ppm means you should not enter the spa — let chlorine dissipate naturally before reuse. The most common new-owner mistake is over-dosing, then trying to soak before the chlorine drops back into range.
Brand
FreshWater®
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