DON'T USE THAT STUFF!!!!! YOU'll SPEND WEEKS ADDING TONS OF CHLORINE TO GET IT OUT!!!!!!! THE CURE IS WORSE BY FAR THAN THE DISEASE!!!!

It's only for desperation situations--which you do NOT have!

Nowhere have I seen that you VACUUMED your pool. Do so and see if it goes away and returns. I get all kinds of similar looking stuff on the bottom of my pool from pollen and dust and it just vacuums up and the pool chemistry is FINE. It looks a lot like that but it's definitely NOT algae--it is brown but not a problem.