For those of you who's battling with hair algae, this is a product that works. There are a couple of threads on RC documenting this product, do a search and read up on it if you're not familiar with this product. I couldn't find any in Canada and had to order some from the US. I ordered extra so I could make the most out of the shipping. If you are interested in this product, I have two 8oz. bottles for sale.
algaefix marine
Asking $15 for each. Pick up in Richmond.
Steven