For the removal of black spots in fibreglass swimming pools (otherwise known as osmosis).
Available in 4kg buckets.
- Will remove most stains from fibreglass pools
- Effective in removing stains and deposits caused by calcium, copper and iron
- This black spot is ONLY found in fibreglass pools
- It is a reaction in fibreglass pools which produces a cobalt hydroxide accretion on the fibreglass
Dosage: 4kg treats 50,000 litres of pool water.