Calstop Concentrated Pool Calcium Scale Inhibitor 1.9L

Calstop Concentrated Pool Calcium Scale Inhibitor — 1.9L

Calstop is Australia's trusted calcium scale inhibitor for swimming pools. The new concentrated 1.9L formula replaces the old 5L bottle and treats pools between 40,000 and 50,000 litres — lasting up to six months per application.

By holding calcium in suspension at levels up to 1,000ppm, Calstop prevents calcium from solidifying and scaling on pool surfaces, salt cells, and equipment. It's especially recommended for pools with Quartzon surfaces and as a must-use during the start-up period of any newly installed pool.

Note: Calstop is a preventive treatment — it inhibits new calcium scale formation but does not remove existing scale.

Key Benefits

• Lasts up to 6 months per application
• Holds calcium in suspension up to 1,000ppm
• Prevents calcium scaling on pool surfaces, salt cells, and equipment
• Softens calcium scale in salt cells making them easier to clean
• Recommended for all pool surfaces including Quartzon
• 1.9L concentrated formula — treats 40,000–50,000L pools

When to Use

• During the start-up period of a newly installed pool
• Every 6 months as a preventive maintenance treatment
• After balancing pool water to recommended levels

Documentation

• Calstop MSDS Safety Data Sheet (PDF)