So I come home yesterday and find my pool covered with a layer of tree stuff. Both floating and on the bottom. I do some basic detective work and see that during the day a tree company took down a 3' in diameter tree just on the other side of my fence. I had a 1/4" layer of sawdust everywhere. My filter baskets (skimmer and pump) were nearly clogged. I cleaned all the filters, skimmed all the stuff off the surface, backflushed the filter, had the change pool vac bags every 30 mins, and checked on the pool after a couple of hours. Most of the loose stuff came up, but the whole bottom of the pool was "stained". Scrubbing with a brush didn't remove it. I don't know if it was tree sap or what. I did a chlorine drop test and had 3.5, and I'm running a SWG with CYA of 55. The water was looking yellow. I started a SLAM process and ran chlorine up to 24 last night and left the pump on. This morning I'm still at 24 (SWG is in BOOST mode). The bottom looks 95% better, but still not fully clean. What else can I do?