We have had a new retaining wall put up in our backyard to include some dirt work. The workers did not cover the pool thus getting topsoil in our pool. We have vacuumed it out every day, but now the pool is a murky green. I'm hesitant to take a sample to our local pool places because they always try to sell you every chemical in their arsinal (not that I'm opposed to buying what is needed, I'd just like to know what to buy BEFORE I go in). The chemical stick comes back normal. Any ideas as to what the problem may be and how to fix it? Thanks.