SpaPure Chlorinating Granules | Spa Chlorine Sanitizer

• 1 x SpaPure Chlorinating Granules (resealable container, granular — available in 1 lb or 2 lb, depending on the size you select)

• Concentrated chlorine formula — 97% dichlor for fast, effective sanitizing
• Controls bacteria — keeps spa water sanitary between and during use
• Maintains sanitizer levels and water clarity — holds a steady chlorine residual for consistently clear water
• Fast-dissolving granular — broadcasts evenly and goes to work quickly, with no slow-release wait
• Dual purpose — routine sanitizer at the standard dose, chlorine shock at double the dose
• Two sizes — 1 lb for smaller spas or lighter use, 2 lb for frequent users or better value

When you broadcast the granules into circulating water, the dichlor dissolves and releases free available chlorine — the active form that destroys bacteria and oxidizes contaminants on contact. The goal is to keep that free chlorine in the 2–4 ppm range at all times, which is why regular additions and frequent testing matter: chlorine gets used up as it works, and warm, heavily used water uses it up faster.

Dichlor is a stabilized chlorine, meaning it contains cyanuric acid that shields the chlorine from burning off too quickly. That's an advantage day to day, but the cyanuric acid stays in the water and slowly accumulates over time.

Pro Tip: Because dichlor slowly builds cyanuric acid (CYA), plan to drain and refill your spa every 3–4 months. When CYA climbs too high, your chlorine gets sluggish and you'll find yourself adding more and more to hold the same reading. A fresh fill resets the water and restores how well your chlorine works.

Always add with the circulation pump running and the filter operating, broadcasting the granules over the surface of the water. Use a test kit frequently to determine and maintain the proper free chlorine residual — actual dosages vary with how often the spa is used and the water temperature.

Routine Application

1. With the circulation pump on, add 1 tablespoon (about 1/2 ounce) per 500 gallons of water.
2. Make regular additions as needed to maintain 2–4 ppm of free available chlorine at all times.
3. Test frequently with a test kit and adjust your dose to hold the target residual.

Shock Treatment

1. Add 2 tablespoons (about 1 ounce) per 500 gallons of water, keeping the pump and filter running.
2. Shock at least once a week, and more often when the spa is used frequently or by several people.

Pro Tip: This one product covers two jobs — routine sanitizing at the standard dose and a chlorine shock at double the dose — so you don't need a separate chlorine shock on the shelf. If you'd rather shock without adding any more chlorine or cyanuric acid, reach for a non-chlorine oxidizer instead.

• Brand: SpaPure
• Product Type: Chlorine sanitizer (granular dichlor)
• Form: Granular
• Active Ingredient: Sodium dichloro-s-triazinetrione (97%)
• Available Sizes: 1 lb and 2 lb
• Routine Dosage: 1 tbsp (approx. 1/2 oz) per 500 gallons
• Shock Dosage: 2 tbsp (approx. 1 oz) per 500 gallons
• Target Level: 2–4 ppm free available chlorine
• Coverage: 1 lb provides roughly 30+ routine doses for a typical spa; the 2 lb provides about double (actual use varies with bather load and temperature)
• System: For chlorine-method spas (not for bromine systems)
• Shipping: Ground shipping only (ships via UPS Ground; classified as a regulated chlorine product)

SpaPure Chlorinating Granules are designed for spas run on a chlorine program — they are the primary sanitizer in that system. They are not intended for bromine spas, which use a different sanitizer chemistry.

They work hand in hand with the rest of your routine: pH and alkalinity balancers to keep the water in range so the chlorine performs, a non-chlorine oxidizer like SpaPure Oxidizing Shock when you want to clear bather waste without adding more chlorine or cyanuric acid, and SpaPure test strips to confirm your free chlorine sits in the 2–4 ppm target before and after dosing.