Heeeeeelllp!!!!!

This is the first time I've ever blogged on anything so forgive my newby or virgin fingers....not much of a computer person!

My family operates Christian Hills Camp which has an 110,000 gallon inground pool. She's old folks! Pretty sure she has a leak somewhere as we add water almost daily! Our problem is, ALGAE!!! She showed up with a vengeance & can't get rid of it. Mostly in the deep end and it's not only green, but some black. I've used about 12 packs of shock on her but still fighting it. I read on Pinterest about the 3 B's but how do I know how much to use. I need a quick solution as I have campers coming on Saturday.