So long story we have a little 3000 gal pool that my wife and I enjoy sitting in and relaxing. We "upgraded" this year from the easy fill pool to the metal frame liner pool and all was well until we started to see some algae on the bottom. We have been fighting it for a couple weeks now. Well after a couple inches of rain from the hurricane that just went through we woke up and the pool was covered in algae and turning green. We always kept the chlorine a bit on the high side because it is always hot and humid here in south Alabama but from what I read the big mistake was deciding to use the floater with hockey pucks maybe. We had a cheap test kit and knew the chlorine was high and didn't understand why the algae appeared. So in a small town we only have a Walmart for pool supplies so off we go to get some shock. They had a 1lb bag HTH I think was the brand and it said 1lb was enough for 13,000 gal so we divided in thirds so should have been enough for 4000 gal. We put it in the pool ran the filter over night and the next day it was still pretty green and algae on the bottom. So we decided to put the rest of it in there enough for 13k gallon total in 24 hours. It has helped but still have some algae on the bottom of pool every evening. The pump has been running nonstop for 7 days and I clean or put new cartridge in it daily. I vacuum and brush the bottom twice a day. It seemed to be clearing up and yesterday noticed some greenish foam on the surface around the vacuum hose re-appearing so my patience were lost and I added a BUNCH of powdered chlorine I had left over before we switched to the pucks. Okay now we got the good test kit recommended on here TF-100 so we tested just now and....Chlorine was off the chart which is expected because I basically tried to shock the pool with the powdered chlorine yesterday. The other numbers are FC-18 CC-.5 so TC=18.5 i think? TA-90 CYA-80 PH-7.8. Any help would be appreciated.