In tropical coral exhibit, the increased number of visitors has led to a rise in CO2 concentration and a decrease in water pH levels, which slows their growth. To address this, we have experimentally installed a photobioreactor. Daily measurements have shown that it helps maintain stable pH levels.

The microalgae (Nannochloropsis sp.) in the photobioreactor absorb excess CO2 from the air, produce oxygen, and purify the air. Depending on the size of the photobioreactor, they absorb 1-10 kg of CO2 daily, replacing one mature tree or 200 m² of surface area. It is known that microalgae absorb 10-50 times more CO2 compared to terrestrial plants