I tried using the aqua broom this morning and it seemed to be working good. then it started spewing the stuff back into the water again. I put a piece of my wife's nylons around the silt bag as recommended from someone and it started spewing out again. I can see the bottom and when it starts vacuuming it is clear and then it gets all stirred up again and back to murky again. I'm not sure what to do with this "stuff". I am pretty sure it is dead algae but how do i get it out?