Lucas

Thanks for the thorough answer I have no intention to limit the growth however. I have a couple small sea urchins, sea cucumbers, and snails in both tanks that are in there for exactly like; clean up!

They can't grow in a sterile environment unless introduced. Once there are enough nutrients available for growth they will grow It can be problematic for aquariums right ?

Not sure, but they can be spread by rain and dust particles, likely they were in a cyst state during this process. Mostly they speared everywhere, is there any place where they don't grow ?

It was probably due to the interparticulate interchange between the air and water surface that algae get up in the air. I see, what makes them fastest growing ?

You can put tap water in a jug, seal it up, leave it in the sun for two weeks and lo and behold, algae will still grow. Where does it come from?