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Learn More › Black algae in a pool is not just unsightly. Although it isn’t harmful itself, it can spread rapidly and harbor dangerous bacteria, like E. coli, that can make swimmers sick.

Regular testing of the water, especially during heat waves, is essential to maintaining the proper balance” - William Gunzbu ...

The algae found in the Blue Lagoon's seawater is ... over the world come to visit Iceland's Blue Lagoon. The geothermal pool's warm waters are rich in minerals like silica and sulfur and can ...