HASA Algi-Control Concentrate 72121 is a 32oz potent algaecide formulated to combat and prevent the growth of yellow and green algae in swimming pools. This concentrated solution can be added directly to the pool water or through the circulation system, with optimal results achieved by targeting areas most affected by algae and around the pool's perimeter. It is compatible with most common pool maintenance chemicals; however, it should not be mixed directly with high concentrations of chlorine or other oxidizers.

Initial Application:

1. Thoroughly clean filter cartridges or backwash D.E. filter.
2. Vacuum algae debris and thoroughly brush the pool.
3. Add 26 ounces ofÊAlgi-Control ConcentrateÊfor every 50,000 gallons of water.
4. Filter forÊ5-6 hours.
5. Vacuum pool after 24 hours to remove dead algae.
6. If algae is still visible, repeatÊstepsÊ3 through 5Êuntil pool is free of visible algae.
7. Once algae are under control, clean the filter and return to normal operation.

Maintenance Application:
Add 6.5 ounces ofÊAlgi-Control ConcentrateÊin 50,000 gallons of water every 3-5 days or as needed.

Booster Application:

Add 6.5 ounces ofÊAlgi-Control ConcentrateÊfor every 50,000 gallons following heavy or prolonged rainfall or when there is a heavy bathing load.

Vacation Treatment:

1. Add 4.8oz. ofÊAlgi-Control ConcentrateÊper 10,000 gallons of water for every week unattended.
2. If treating with a chlorinating shock, applyÊAlgi-Control ConcentrateÊon opposite ends of the pool.