Good one brandon!Cyano origination test, where does it come from look see
put a cup of distilled water on a windowsill all summer long opened but topped with distilled (someone do, post back) so that it gets only natural contaminations and heat/cold cycles. Gnats, dust, a spiders web depending on how clean someone's sill is, leave it all there. Vectors
On August first after a mo and half prep sitting there, add only freshwater planted tank fertilizers that include n and p in any ratio. If no algae or cyano got in this tank since we've added nothing of aquarium origin, then we've only created a dilute soln of fertilizer, cup sides will remain free of depositional growths.
End of August, cup has life easily seen, monera... how did cyano get in there?
I would have my doubts it is cylindrospermum sp. In that cup.
I have not studied any freshwater species but still I would have to say it has to be introduced.
Now for saltwater species I have been trying for months to see if it just "appears " in my tests. Tests are no3,po4 and amino rich
I feel I am conclusive in my findings.
Also this is ongoing still to the day as I add more information to this work.