Mustard Algae???

[Jaybird70]

I have a sand filter. I'm pretty sure it's algae, as it feels slimey and when I backwash the filter the water is somewhat green. Also it I let if go, it just grows and grows. So, maybe I just need to bring my chlorine up higher, I haven't gotten it past 15 ppm so maybe it's just really hard to kill.

I'll have to wait until after this weekend as we're having heavy rains that are suppose to last all weekend. I'm sure my pool will be a pretty sight after that. Sigh.

BTW Feulman, that stuff in your pool looks almost exactly like mine, except I have a yellow film everywhere. The pool is clear until I start brushing and then it gets cloudy. I'll definately try shocking to 25 once the rain stops.