We had our pool filled by the fire department just a few days ago, as we had purchased this used pool.  The water they used came from an Artesian Well and when the water came out first it was brown colored and then turned clear.  Our pool is clear, but we have this brown colored sediment in bottom of pool.  The pool is too cool to go in it yet and the vacuum is not really picking this up, it picks it up slowing and there is still a lot down there.  Any ideas what I can  do to get this off the bottom of the pool or what this would be as well?