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Algae & Stain Treatment »


SB (2)


($17.69 )

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SPOTBLOC is a Unique Spot Stain Removal Chalk that dissolves metal and organic stains from underwater surfaces. Ideal for removing the waterline scum mark or any other underwater spot stains. SPOTBLOC is a blend of Special Acids and Chelating Agents with Block Technology.

The BLOCK HOLDER is a great tool to reach stains if they are at the pool bottom or the water is too cold. 

  • Simply Rub on Powerful Chalk
  • Remove Calcium Scum Line
  • Remove Annoying Organic and Metal Stains
  • Use the Block Holder & Algaebrush


Identify the stains to be removed and you will need to be able to reach the stain with your hands or use the Block Holder.  Then simply rub SPOTBLOC on to the stain. Use a criss-cross pattern to build up a thin layer of SPOTBLOC's unique stain removing chalk over the stain. Check stain after 24 hours and reapply if necessary, severe or old stains may require several treatments. When finished place SPOTBLOC in a safe place away from children to dry before putting back into the container.

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