Husbandry includes many things from type of livestock you keep, types of filtration, the maintainance you perform, import/export of nutrients etc.....
It really encompasses "everything" and how it relates to each other. Poor husbandry practices can lead to things like excessive algae, parasites, stress even death to your livestock and tank.
As for the hair algae, I wouldn't stress too much about it right now......Hand prune what you can get too, even take out and scrub the rock in Saltwater if possible....
What I would focus on for now is Nutrient Import/ Export. How much of what do you feed? Is it alway completely eaten or does it wind up hidden in the rocks?? What do you do to get excess nutrients out? Frequent water changes or just rely on the skimmer? Do you have enough
Biological filtration or is mechanical and chemical needed at this point?
Those are all rhetorical questions to make you really think about what is going on in and with your tank.
Basically, Algae is quite common in this hobby (especially newer tanks) and we can control it through our practices. It may grow quickly sometimes, but to get rid of it will take MUCH longer. It needs a source of food (nitrates and phosphates) which almost always comes from the keeper himself.
I'm not familiar with your tank, but how about some specs? Size, type of filtration, lighting, skimmer, flow, feeding habits and water parameters to start with!
I'll stop here for now, hopefully this is a start for your personal "think tank" about your system.
They have grown about an inch in a week. Here are a couple more pics. Does this look like hair algae? If so, what do I do? Turbo snails are not eating it.
Can you explain the "examine your husbandry before adding anything to try to fix it otherwise" 
