I have a problem where I was told to add flock to our pool to "help" settle the dead algae. The same day, we got 4 inches of rain. We have been fighting both algae and thedanged flock since the end of May. To exacerbate the problem, we have had 104 degree heat every day for almost 2 weeks. I have about defeated the algae, but the flock seems to never go away. We run our filter and pump 24/7 (cheaper that way), and use the pool everyday. Our chlorine level is fine about 5 (not.5) ppm and altho it is a bit high, with all of the sunshine and heat it seems to me to be necessary. My question is this: Does the Diatamaceous Earth go through the pump, and will it hurt it or does it go straight to the filter? We live in the country so everything is easily acessable.