Rain water

[Bluerooster]

Just wondering about what is in rainwater that would expedite the growth of floating clumps of algae.

 

[Stephen Noble]

It is loaded with nitrogen. Not the specific scientific answer but that’s it in a nutshell. That is why farmers love lightning storms and snow.
Stephen

 

[Bluerooster]

Makes sense

 

[Lisak1]

Yup. That's why they call a late spring snowfall the poor farmer's fertilizer!

 

[carolinaguy]

Acid rain. Acidic water promotes algae growth. Our rain around Charlotte drives ponders nuts because it drops pH about 0,6 after a big rain. Happens every time.

 

[sissy]

Rain these days catch's so much pollution coming down that it can change your ph also .That is why after a rain storm the air smells so fresh and clean