One day I was cleaning an old plastic container stained by tea. The way I cleaned it was to leave it in the sun (sealed water tight, 2gallon, clear blue tint container) after filling it with hose water (exposure cleaning). I then noticed that green algae had started growing(a noticeable thin layer say 2mm thick, average) at the bottom of the container(in partial sun)... It did clean the container, after about a month.
I then re-filled the container to see if algae grew again(full light this time, algae on the bottom like before), it did.
This algae:
What are the odds that its dangerous to ingest(the algae it self in large quantities)?
More importantly, what are the odds it could be good for me?
What kind of chemicals might be absorbed by the algae, perhaps making the water more clean in a natural way?
If it's just inert that's cool too, I'll just keep it as a decoration or maybe use it as fertilizer.