Yes, my reasons are also phosphate and in addition nitrate. That is what is most likely feeding the algae and also I have gotten responses that it should go away with time (the algae). As to why it would be better, I don't know, I have just read arguments about it being as good.I would agree that it is often better than tap water but I have reasons for why such as phosphates. But why would it be just as good as RODI? Did your sources explain it or just make a statement?
Thanks!