I have an Easy Set 18' pool with the Intex 1500 Gallon filter pump (I believe it's 1500 gallon, the pool is three years old and uses the B catridge). I had some brown slime growing on the pool floor, so I used my pool brush and scrubbed it up. Now what I assumed to be dead algae is floating around the pool, causing the water to become cloudy. I've tried shocking and algae guard and the water remains cloudy. I read about diatomaceous earth and how well this works to clear up cloudy water and allow dead algae to be filtered out more effectively. is this something I can use with this type of filter (without damaging it)?