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Black Algae Invasion

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On 1/5/2020 at 9:23 PM, SwimmingPoolsThailand said:

The algaecide is essential once black algae has been detected. Scrubbing it will of course send fine particles into the surrounding water, so the filter must be particularly clean. In the worst case scenario the sand should be changed.

When the algae appears to have been removed, shock the pool with Dichlor or Cal Hypo. Continue to use Algaetrine for a while as a prophylactic.

Copper Sulphate. Available at a low cost compared to propriety stuff.

Use at 50% of the dosage you see on the interweb and add on at least a 5 day interval until cleared. It's difficult to counter if you overdose.

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