Ok, several things:
If your hair is bryopsis, some people have been having a really good experience by raising their magnesium up to ~1600 with Kent Tech M. Apparently it reacts with something in the plant and inhibits photosynthesis or somesuch. I can grab a link to a few threads on that, if you'd like.
If you really want to get rid of the hair, your best bet probably isn't critters, it's actually water changes. Ha. Your params, like stated before, can be around 0 because the hair is just eating all the stuff in the water.
I've got hair in my tank, too, and i'm just trying to keep my water clean and (recently) switched to ro/di, which i wasn't using before.
Anyway, my two bits....
Tank looks awesome, though. I do like the lawn, as long as it stays short.