How long does the shock take?

2-3 hours per tablet to fully erode; leave overnight for maximum effect.

How much for my pool?

1 tablet per 25-30 m³ for routine shocks; 2-3 tablets for algae blooms.

Can I bathe straight after?

No. Wait until free chlorine drops below 5 ppm; usually morning after overnight shock.

1 kg (5 tablets) and 5 kg (25 tablets).

Why not just use granules?

Tablets save weighing, pre-dissolving and the mess of bucket dosing. Cleaner for skimmer feed.

No. Unstabilised cal-hypo, no cyanuric acid added.

What is the active ingredient?

Calcium hypochlorite at 65% available chlorine, unstabilised, in 200 g compressed tablets.

Why does it raise pH?

Cal-hypo dissolves alkaline; expect 0.2-0.3 lift per shock.

Tablet vanished but chlorine low?

Demand exceeded dose; follow up with granule shock and check for biofilm.

pH spiked; drop to 7.2 with pH Minus and dose clarifier.

Rapid shock tablets vs granule shock?

Tablets are slower, controlled and tidy; granules are faster and stronger but messier. Use tablets for skimmer feed, granules for whole-pool emergencies.

Rapid shock vs TCCA tablets?

Rapid shock is unstabilised cal-hypo for short shocks; TCCA is stabilised slow-feed for routine sanitising. Different jobs.

Pool Rapid Shock Treatment - Combined Sanitise & Clarify

Name: Pool Rapid Shock Treatment - Combined Sanitise & Clarify
Brand: ClearSpa
SKU: psh-3
Availability: InStock
Rating: 5.0 (4 reviews)

Fast-acting cal-hypo shock tablets for spot-treating problem zones. 200 g unstabilised tablets dropped into the skimmer or feeder for a controlled overnight shock without weighing granules.

Releases 10-12 ppm of free chlorine over 2-3 hours per tablet.
Targets specific problem zones via skimmer feed.
Adds no cyanuric acid, ideal for high-CYA pools.
Cleaner to handle than granules; no weighing or pre-dissolving.
Pairs with a weekly granule shock for full-pool oxidation.