Another skimmer issue

[gregzz4]

The skimmer was first fired up when I started using epoxy, so about 2 weeks

I was cleaning it and the socks as needed, sometimes multiple times a day
I put the sand in on Thursday and then on Friday cleaned the skimmer out just in case there was sand in it
It seems that's when it started acting up, before the cleaning

I got tied up yesterday so today I'm doing a 15% WC. I'm hoping this will show some results as maybe, as Kenny suggested, there could be some residual glueing crap in the water