Hi! I’ve been reading and learning what I can the last couple of weeks as I just purchased a home with a pool(first one both home and pool). I started off with ZERO pool knowledge and have already learned so much from you guys so thank you but I’m definitely still learning and feel like I’m 5. I had no interaction with previous owner so i have no pool info or history just what I’ve managed to learn about my system from this site. I GUESS my pool is around 24,000gals. The deep end is about 9-10ft. Anyways, Tuesday I awoke to a terrible green disaster. I have been using liquid chlorine and brushing and back washing and it has slowly got to the point where I can see the main drain again but as you see by the difference in pictures...Still a LONG way to go. I have ordered the T600? Off of amazon but it has not arrived yet so I hit up my 2 local pool stores within 30mins of each other and these are the results I got. Pretty different. One told me my chemicals were fine so it’s the o rings in my backwash piston making the green keep going back into the pool, the other told me I’m just bleaching the algae and need a whole bunch of algae killing chemicals. Based off these results can somebody PLEASE steer me in the right direction so I don’t get suckered into buying unnecessary items to fix this. THANK YOU SO MUCH IN ADVANCE!!!