We hose off the grids to clean them. They come out as clean as they usually do, so that doesn't seem to be a problem. Also we put in 9 cups of DE which is also the same amount as normal.

Unfortunately, we don't have a recirculate option. Our system only has backwash or filter, so recirculation isn't an option for us.

We dumped in a bunch of algae killer, but I guess it didn't fully work. Looks like bleach is good for killing algae. How much should we use in a 10kgal pool? Our test kit can't test very high levels of chlorine.