what's the best way to stabilize my 70,000 litres (18,500 us gallons) concrete pool, it's cloudy and i have a mustard looking algae (note completely out of control) . i shocked it, tossed in a half bottle of concentrated banish, and 3 clarifying tablets in the basket. I back washed first. i also up the the chlorine, and reduced the ph it was showing 8.1, and had the robot cleaner in for 3 hours. i have not vacuumed the pool with the filter. am i doing anything wrong? the wife got a party with all her girls this weekend got to get things in shape.