I have been going crazy trying to kill what I think is algae. I have a 21000 gallon fiberglass pool salt system. According to the pool store my numbers are all good. Unfortunately I don't have the numbers. I'll post them tomorrow after testing again. When I was running my Dolphin Deluxe 4 robot it seemed as if the pool water would go cloudy. Yesterday I decided to change the sand in the filter because it just was not cleaning. Right after that the robot broke (The bearings went) and I shocked the pool (with powdered shock) and the stuff keeps settling on walls and looks green. This settling seemed to happen last week after shocking the pool. If I go to even touch the stuff it just blows away. Should I re-shock with liquid shock? I was reading on here that people just use clorox. Should I do that?
Also a different question. I noticed that some of the newer robots have finer filters to help pick up algae. Any recommendations on that? This has been going on for 2 weeks since I opened the pool. When the pool opened it looked like a swamp.
I am in NJ and have lots of trees around my yard so I get lots of junk in the pool this time of year.
Edit.. I forgot to add. Every time I backwash, even after changing the sand yesterday, the water shooting out of the jets is cloudy. I always wait until clear, and then rinse until cleared as well. I never noticed this in the past and think it might have something to do with the possible algae.