Algae and pH value

[no idea]

what is the relationship between Algae and pH value? why there are more algae ,pH value rises?

[matthyaouw]

I may be wrong here, but dissolved CO2 is acidic, and as algae removes it from the water during photosynthesis, PH will rise. I'm sure It's more complicated than that, but that might be good to start you off.

[kreil]

yeah, algae use the dissolved co2 for life processes and in doing so can cause the pH of water to rise very rapidly, especially if it is warm