Frog Algae Blocker 4Pro

It is a violation of Federal Law to use this product in a manner inconsistent with its labeling. Do not use FROG® Algae Blocker 4Pro with any other copper-based products.

1. Backwash or clean the filter and remove all debris from the skimmer and pump baskets.

2. Ensure the filtration system is operating properly and water is circulating adequately.

3. Balance pool water prior to application:

   • pH: 7.2–7.8

   • Total Alkalinity: 80–120 ppm

   • Cyanuric Acid: 20–80 ppm

4. Have pool water tested for existing metal levels, including copper.

5. If copper or other metals are elevated, follow professional recommendations to reduce levels before using this product.

6. Add FROG® Algae Blocker 4Pro according to the dosage instructions on the product label based on pool size.

7. Apply the product with the pump running to ensure proper circulation and distribution.

8. Run the pump and filter continuously for at least 24 hours after application.

9. Maintain normal chlorine or other approved sanitizer levels during use.

10. Operate the filtration system a minimum of 8 hours per day for continued algae prevention.

11. Brush pool surfaces as needed to help prevent algae buildup.

12. Clean or backwash the filter only if pressure rises 10 PSI or more.

13. Reapply FROG® Algae Blocker 4Pro as directed on the product label to maintain ongoing protection.

14. Wash hands thoroughly after handling and remove and wash any contaminated clothing before reuse.

• 5,000 – 10,000 gallons: 1 pod
• 10,000 – 20,000 gallons: 2 pods
• 20,000 – 30,000 gallons: 3 pods

Copper (II) Sulfate Pentahydrate (CAS 7758-99-8): 52.8%