HTH® Super Green to Blue Shock System

Fight a severe algae bloom and return your pool to its clear blue appearance with the HTH® Super Green to Blue Shock System for indoor and outdoor swimming pools.


About This Item

Fight a severe algae bloom and restore your pool to crystal clarity in 24 hours! This 2-step shock treatment is designed to shock your pool with a boost of chlorine to kill bacteria and algae, then drops dead algae particles to the pool floor with a flocculent for clear, healthy swimming pool conditions. This pool shock is great for all pool types and won’t fade your pool liner. This is not designed for pools that cannot vacuum to waste.

PLEASE NOTE: This product is not designed to work with pools that cannot vacuum to waste. It may not work for certain pools, including pop-up pools with D.E. or cartridge filters.

  • Transforms pool from green to blue in 24 hours!
  • Fast-acting formula kills green algae and prevents future algae blooms
  • Dissolves quickly so you can get back to swimming fast
  • Effective for all swimming pool types including vinyl-lined pools, Gunite pools, and salt water pool systems
  • Easy-to-follow instructions make DIY pool care simpler than ever
  • Won't fade liners
  • Designed ONLY for pools that can vacuum to waste

friends playing in pool - HTH super green to blue - stay clear all summer long - with HTH, it's easy. just right.


Transforms Your Pool Water from Green to Blue Within 24 Hours

HTH Pools - Lady swimming in blue swimming pool water

Kills Green Algae

Chlorine is very effective at killing and destroying green algae. The high dose provided by the HTH® Super Green to Blue Shock System quickly destroys severe green algae blooms that make water green and opaque.

HTH Pools - above ground pool with wraparound deck

Clears the Water of Debris

The heavy duty flocculant in HTH® Super Green to Blue II works fast to settle dead algae and debris to be vacuumed as waste and return the crystal clear blue appearance to the water

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Keeps Water Clear

The fast-dissolving formula found in HTH® Super Green to Blue acts quickly to restore clarity to your water so you can be back in the swimming pool within 24 hours. Maintaining proper sanitizer levels and using a preventative HTH® algaecide will keep the water crystal clear.

How to Use HTH® Shock Treatment

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1. Test pH Levels

Dip an HTH® Multi-purpose 6-Way Test Strip (sold separately) into the water to measure total alkalinity, pH, free available chlorine (FAC), calcium hardness, and cyanuric acid or stabilizer. Balance water, and adjust alkalinity and pH levels, where applicable.

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2. Apply Directly to Water

Before handling any chemicals, put on protective gloves and goggles. During evening hours and with the pump running, broadcast the HTH® Super Shock! Treatment evenly along the deep end of the swimming pool. 

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3. Wait & Test Chlorine Levels

If granules settle along the bottom of the pool, use a brush to disperse until granules are dissolved. Once free available chlorine levels are between 1 and 4 ppm, your pool is ready to use again.




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