Heavy would be considered where you cannot see the bottom of the pool/barely can see bottom of pool OR you have tried the 'light' Algae Treatment at least 48 hours prior with no results.
Follow this treatment in order:
- Brush the bottom & sides of pool to loosen up algae
- Add 2 Gallons of Oxidizer per 10,000 gallons of water
- Add 2 Pints of CDX per 10,000 gallons of water
- Top Sanitizer up to 50 ppm - Use Baquacil Test Strips to check level
- 12-24 Hours later add Flocculant or Clarifier if cloudy
- Run Filter non-stop for 24-48 Hours until clear
- Vacuum the pool thoroughly
- Clean filter with Baquacil Filter Cleaner