The Users' Guide to Green Hair Algae
[a companion to the cyano thread]
Green Hair is actually tougher to get rid of than cyano---because it pretty well WILL run its course in a tank.
But it's a pretty straightforward algae. It loves phosphate. It grows like mad in a new tank.
A lot of new people, hearing the bit about phosphate, run out and get a phosphate test. This is pretty useless for the green hair algae period of a tank. Of course you have...