Hello. We had our pool water tested 2 days ago. Water levels were perfect and the water was almost clear except for the brownish stuff at the bottom. We purchased a robotic vacuum and ran it yesterday. It immidiately started turning the water dark green. So we dumped an entire bottle of algeacide in the water (the correct dose for our size pool). Today our water is even greener. The only thing our vacuum removed was a green slime. I don't know what to do know and the pool stores are closed today.
We have an above ground 30ft pool with a sand filter and robotic vacuum. Approximately 21,000 gallons.