We opened our 8 year old inground pool today and unfortunately found algae and leave stains for the first time ever--on sun shelf and steps. After testing the water, we decided we needed to drain some as our calcium hardness was up to 550 (kept creeping up every year). So we are draining half of the water, brushing, brushing, brushing. We will start refill tonight. What should my next steps be in making sure we eradicate the algae? It was only on the sun shelf and steps it looks like. (We replaced our automatic cover 2 years ago and it doesn't seem to be as impervious as our previous one; also our neighbors planted a huge maple tree close to our side and we have leaves find their way in during the winter.) Our FC was clear down to 0.4 , but according to my records that is not unusual.
Thanks so much for any advice!
Thanks so much for any advice!