HTH™ Pool Care Green to Blue Advanced
2-Step Pool Shock & Flocculant
HTH™ Pool Care Green to Blue Advanced
2-Step Pool Shock & Flocculant
HTH™ Pool Care Green to Blue Advanced Shock is a two‑step pool recovery system designed to correct severe green water caused by algae blooms.
- Advanced I delivers a powerful calcium hypochlorite (cal hypo) shock that kills algae and bacteria without adding cyanuric acid (CYA), helping avoid chlorine lock.
- Advanced II is a flocculant that binds to dead algae and fine debris, causing it to sink to the pool floor for direct vacuuming to waste.
Used together and with the proper equipment, this system can transform green pool water to clear blue in as little as 24 hours. It is safe for vinyl‑lined pools when used as directed and is especially effective after storms, heavy algae outbreaks, or periods of high pool use.
Product Benefits
How to Use
Before You Start
This system requires specific pool equipment to work correctly. Do not begin unless you have the following:
- A filter system with a multiport valve that includes Recirculate (or Bypass) and Waste settings
- A manual pool vacuum that connects directly to the filter system
- The ability to vacuum to waste
This product will not work with robotic cleaners or vacuums that collect debris in mesh or debris bags.
How to Use
Follow each step in order. Allow products to fully dissolve and work before moving to the next step.
Step 1: Add Advanced I
Set the filter to its normal filtration setting.
Add the entire contents of Green to Blue Advanced I directly to the pool.
Allow the product to fully dissolve and circulate through the water.
Step 2: Add Advanced II
Once Advanced I is fully dispersed, switch the filter setting to Recirculate or Bypass.
Add the entire contents of Green to Blue Advanced II through the skimmer.
This product may appear brown or orange in color. This is normal.
Step 3: Circulate and Let Settle
Leave the filter running on Recirculate for 1 hour.
Turn the pump off and allow the water to sit overnight.
The flocculant will bind to dead algae and settle on the pool floor.
Step 4: Vacuum to Waste
Once debris has settled (up to 24 hours), set the filter to Waste.
Carefully vacuum the sediment directly out of the pool.
Do not vacuum through the filter.
After vacuuming, return the filter to its normal filtration setting.
Helpful Tips
- If particles are slow to settle, lightly mist the pool surface with a garden hose to break surface tension.
- If the pool remains green, repeat the shock step before allowing the flocculant to settle again.
- Severe algae blooms may require more than one shock treatment.
- Always test water chemistry after treatment and adjust as needed.
Ingredients
What’s Included
- HTH Pool Care Green to Blue Advanced I (Cal Hypo shock)
- HTH Pool Care Green to Blue Advanced II (flocculant)
Green to Blue Advanced I
Active Ingredient:
Calcium Hypochlorite: 56.44%
Other Ingredients: 43.56%
Total: 100.00%
Green to Blue Advanced II
Ingredients:
Contains polyaluminum chloride.
Safety, Storage, and Disposal
Safety & Label Guidance
This kit contains multiple pool care products. Always read and follow the directions, safety precautions, and first aid instructions on each individual product label.
Do not mix products together and do not use in floaters or feeders.
Keep all products stored in a cool, dry, well‑ventilated area and out of reach of children.
Green to Blue Advanced I
Active Ingredient:
Calcium Hypochlorite: 56.44%
Other Ingredients: 43.56%
Total: 100.00%
Green to Blue Advanced II
Ingredients:
Contains polyaluminum chloride.
Reviews
Block Chlorine Lock with Cal Hypo
Discover how Cal Hypo pool chlorine works without CYA to prevent chlorine lock and keep pool water clear, balanced, and safe for swimmers.
Simplified Pool and Spa Care with HTH™ Test to Swim
Simplify pool and spa water testing with the HTH™ Test to Swim™ App. Scan your test strip, get instant results, and receive personalized pool care recommendations.
Transform Your Pool with Brilliance™
Looking for clearer pool water? Discover how HTH™ Brilliance Cal Hypo Chlorine Tablets improve water clarity and prevent chlorine lock.
Quick Pool Tips
Always read product label directions prior to using and use only as directed
Always add chemicals to pool water, never the other way around
Never add chemicals to pool water when people are in the pool
Never mix products together
Always store pool products in a cool, dry location and out of direct sunlight
