Durachlor Hardness Increaser is a top-notch, quick-dissolving granule that boosts your pool's calcium hardness and protects it from harm. It's a must-have for maintaining ideal levels of 200-400 ppm to avoid pesky problems like etching and corrosion in any pool type. Plus, it plays well with all sanitizing systems, making it a crucial part of keeping your pool in tip-top shape.

Features: 

Raises Calcium Hardness Levels: Effectively increases calcium hardness, preventing etching, pitting, and similar problems in plaster, masonry, and concrete pools. 

Prevents Surface Corrosion: Proper calcium levels help prevent corrosion of pool surfaces and equipment, extending their lifespan. 

Quick-Dissolving Granules: The granular form dissolves rapidly, allowing for easy application and swift results. 

Easy Application: Simply add the recommended dosage directly to the pool water with the circulation system running, and brush any undissolved particles from surfaces.