Winks;4068280; said:Iron doesn't have anything to do with it, like someone said.
see the article below; soluble iron - - i.e., iron in the water, as opposed to in the soil - - is certainly considered a potential factor in hair algae outbreaks
http://www.thekrib.com/Plants/Algae/red-algae.html
I've also come across suggestions that hair algae may thrive in tanks which are very low in nitrates; I don't know if that's true, but it is consistent with what I have experienced . . .
