HTH® Granular Shock Chlorine - Unstabilized shock treatment
HTH® Granular Shock Chlorine - Unstabilized shock treatment

HTH® Granular Shock Chlorine - Unstabilized shock treatment

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At Q-TECH, we apply the same clear rules for everyone: the law protects you, and when applied correctly, it protects us as well. By processing your purchase, you accept our General Terms and Conditions of Sale. If you are purchasing as a consumer (B2C), nothing stated herein limits the rights granted to you by mandatory law (RDL 1/2007, TRLGDCU): the 3-year legal warranty of conformity and the right of withdrawal under the terms and with the exceptions legally provided, which are detailed below. References to "B2B" apply only to businesses and professionals.

Your guarantees

  • Rights intact: 14 days of withdrawal from receipt for most products—subject to the legal exceptions you will see below, such as goods made to your specifications—and a 3-year legal warranty of conformity, under the terms of the TRLGDCU.
  • Conformity with the description: we guarantee that the equipment will correspond to the published technical description and what one could reasonably expect from it (arts. 115 et seq. TRLGDCU). Images and videos are for guidance only: the manufacturer may supply a more recent revision of the product or introduce minor aesthetic, packaging, or firmware changes, without this constituting a lack of conformity as long as the described characteristics and performance are maintained.
  • Traceability that also protects you: we document the condition, serial number, and seal of each piece of equipment upon shipment, and we video-record the opening of returns; this is your proof of the condition in which the goods were delivered.

Responsible use and your part

  • If you are thinking of returning it, keep it as you received it: without installing or activating it, with its seals, accessories, and packaging intact. This is how to ensure a full refund, without deductions.
  • Handling that exceeds inspection reduces value: handling the equipment beyond what is necessary to verify its nature and operation may result in a real, assessed, and case-by-case justified deduction (art. 108.2 TRLGDCU), never a fixed percentage. In particular: activating or registering the serial number, linking it to a manufacturer's account or app, circulating water through hydraulic equipment, unsealing probes, or installing software or consumables. Initial inspection of the product does not lead to a deduction.
  • The same item must be returned: withdrawal requires returning the supplied unit. Different equipment, or equipment with prior use, age, or wear prior to purchase, does not constitute a valid withdrawal.
  • Installation and cybersecurity, shared responsibility: this is technical hardware; you are responsible for correct installation, credentials, patches, and backups, while we deliver a compliant product. Q-TECH is not liable for damages resulting from poor installation, incorrect configuration, or omission of patches by the customer or third parties (in B2C, without prejudice to the legal warranty and liability for intent or negligence, arts. 86 and 130 TRLGDCU).
  • Delivery of bulky goods: delivery is made to the curb. B2C: transport risk is ours until physical delivery (art. 66 ter); we recommend noting visible damages on the delivery note and notifying us of breakages within 24-48 hours with photographs to activate the insurance. B2B: inspection and notation on the delivery note are mandatory; hidden damages must be reported within 24 hours (art. 366 CCom). Unjustified rejection or incorrect shipping information will entail the actual outbound and return costs (approx. €85-550 for heavy machinery).

Made to your measure (Advanced Pre-Assembly)

  • If your order includes equipment, racks, hydraulic assemblies, or technical rooms made or configured according to your specifications (permanent joints, custom cuts or wiring, parameterization, pressure testing), these are custom goods without the right of withdrawal from the conclusion of the contract (art. 103.c TRLGDCU; CJEU Case C-529/19), which is informed before purchasing and documented in the signed Order Note. A test you request without permanent modification retains your right of withdrawal, with only the actual loss of value caused by that test being deducted. Would you prefer to receive it tested, configured, and ready to connect, without assuming these risks? Contract our Advanced Pre-Assembly or the prior technical audit.

If you are purchasing as a business or professional (B2B)

  • The transaction is governed by the Commercial Code: firm sale, without the right of withdrawal; notification of defects within 4 days (apparent) / 30 days (hidden), arts. 336 and 342. Q-TECH acts as a distributor and excludes indirect damages, loss of profit, and data loss, limited to the price of the equipment, without prejudice to the manufacturer's commercial warranty.

Product warnings v1.0 · June 2026. Information summary; the complete and binding conditions are those published at q-tech.es.

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hth® GRANULAR: Chemical Engineering for Critical Disinfection

The hth® GRANULAR is a high-purity calcium hypochlorite designed for advanced water disinfection in private and public swimming pools. This fast-dissolving granular compound ensures effective eradication of bacteria, viruses, fungi, and algae without adding isocyanuric acid.

The cost of inaction when using stabilized disinfectants includes chlorine lock due to over-stabilization and the need for forced partial drainage. The hth® GRANULAR resolves these failures through active, stabilizer-free chlorination, maintaining maximum biocidal efficacy without interruption.

Treatment Optimization Without Over-stabilization

The hth® GRANULAR stands out for being completely free of isocyanuric acid, which prevents the accumulation of residues that inhibit disinfecting action. This feature is essential for keeping water biologically safe in facilities with high foot traffic or intense sun exposure.

  • Superior Biocidal Efficacy: Average available chlorine content of nearly 68% for immediate destruction of pathogenic microorganisms.
  • Low Mechanical Residue: Insoluble content of less than 3% in distilled water, protecting filtration systems against premature clogging.
  • Hydraulic Versatility: Compatible with all filtration equipment and usable in water with high TH or extreme hardness.
  • Regulatory Safety: Authorized by the Ministry of Health for the disinfection of public pools under authorization no. 1281.

Dosing and Operational Safety Protocols

The application of hth® GRANULAR requires precise technical procedures to ensure user safety and installation integrity. Its nature as an oxidizing agent requires strict storage away from moisture and at temperatures below 40°C.

  • Shock Procedure: Dose 150 g per 10 m3 of water after adjusting the pH between 7.0 and 7.4.
  • Management in Public Facilities: Dissolve 2 to 2.5 kg per 100 liters of water in the dosing pump conditioning tank.
  • Ongoing Maintenance: Estimated daily consumption between 0.5 and 1.0 kg per 100 m3, adjustable based on usage and water agitation.
  • Parameter Control: Maintain an active chlorine level between 0.4 and 1.4 mg/l to ensure biosafety of the pool.

Technical Specifications

  • Active Ingredient: 68% Calcium hypochlorite.
  • Active Chlorine Content: Minimum 65%.
  • Physical Format: Fast-dissolving granular.
  • Stabilizer Content: 0% (Free of isocyanuric acid).
  • Insolubles: Less than 3%.
  • Storage Temperature: Maximum 40 °C (daily average below 35 °C).
  • Hazard Classification: May intensify fire (oxidizer) and causes severe skin burns.

Compatibility and Application Limits

The hth® GRANULAR is compatible with all standard filtration systems. It must be applied directly to the skimmer with the filtration system running, provided the system does not contain prior stabilized organic chlorine to prevent violent reactions.

TECHNICAL RESTRICTION: Never pour water onto the product; contact with small volumes of water can generate heat and toxic gases. Do not mix with any other chemical product and avoid bathing if the chlorine level is higher than 4 mg/l.

Frequently Asked Questions

  • Can I use hth® GRANULAR if my pool already has stabilizer? Yes, but you must verify that the stabilizer content is less than 75 mg/l. In stabilized water, maintain a minimum available chlorine level of 2 mg/l.

  • How do sun and heavy usage affect product consumption? Daily consumption increases proportionally with sun exposure, number of bathers, and water agitation, such as in the case of slides or counter-current systems. In outdoor pools, adding controlled stabilizer can help reduce this consumption.
  • What safety measures should I take during handling? Never dissolve the product before use and do not pour it in the presence of bathers. Use the supplied measuring scoop only when it is dry and store the container in a dry, ventilated place.

Q-Tech Technical Support

At Q-tech.es, we provide specialized technical assistance for the automation of chlorination in collective and industrial pools. If you require a technical audit for the integration of dosing pumps with hth® GRANULAR, contact our field engineers.

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