Why won’t my pool water clear up?
- Thread starter Jack
- Start date
Mark Davis
Member
Sometimes shocking alone doesn’t clear it up if your filter isn’t catching the fine particles. I’d clean or backwash your filter and maybe add a clarifier to help the small stuff clump together. Also double-check your pH if it’s off, the chlorine won’t work as well.
John Miller
Member
If it’s still cloudy after shocking, it’s probably a filtration problem now, not a chemical one. Make sure your filter is running long enough like 24–48 hours straight if needed. You could also try a flocculant, but that’ll mean vacuuming the settled stuff out manually after.
Jake Roberts
Member
I had the same thing happen once and it turned out my filter needed a deep clean. Also, sometimes dead algae hangs around even after you shock. Try running the pump longer and brushing the walls and floor to stir everything up so the filter can grab it.
William Walker
Member
Hey Jack! I’ve had this happen before, and sometimes it’s not just about shocking. If the water's still cloudy, maybe there’s still a bit of debris hiding that the filter’s missing. Have you tried using a pool vacuum or even running a pool sweep to get rid of the tiny particles? It could be that your filter just needs a little extra help catching all those micro-debris. Just a thought hope it clears up soon!
Kevin Marsh
Member
Had something similar last year and ended up chasing my tail for days. In my case, it turned out to be old stabiliser buildup. My CYA (cyanuric acid) was through the roof, which I overlooked at first. Chlorine was in range, but it wasn’t doing much because of how high the CYA was.
I ended up draining about a third of the water and refilling. Once I got that balanced, the shock finally kicked in, and the water cleared up. It might be worth checking if your stabiliser is creeping up, especially if you’ve been using tabs a lot.
I ended up draining about a third of the water and refilling. Once I got that balanced, the shock finally kicked in, and the water cleared up. It might be worth checking if your stabiliser is creeping up, especially if you’ve been using tabs a lot.
Andrew Coleman
Member
Jack, I ran into this exact headache earlier this season. What finally made the difference for me wasn’t chemicals or shocking again, but checking my circulation setup. My return jets were pointed kind of randomly, so parts of the pool weren’t getting much movement at all. Once I aimed them so the water flowed in one consistent loop, it pushed all the fine stuff toward the skimmer instead of letting it hang in the corners.
Another thing I noticed was that my water level was a bit low, which meant the skimmer wasn’t pulling in debris the way it should. As soon as I topped it up and adjusted the jets, the cloudiness started clearing within a day or two.
Might be worth giving that a shot if you haven’t already, sometimes it’s the small mechanical tweaks that solve what chemicals alone can’t.
Another thing I noticed was that my water level was a bit low, which meant the skimmer wasn’t pulling in debris the way it should. As soon as I topped it up and adjusted the jets, the cloudiness started clearing within a day or two.
Might be worth giving that a shot if you haven’t already, sometimes it’s the small mechanical tweaks that solve what chemicals alone can’t.
Michael Young
Member
I’ve had the same thing happen. Turns out, my filter needed cleaning and the sand needed to be replaced. After cleaning and running the filter longer, the water started clearing up. Maybe check the filter again and make sure everything is working well!
Mason Blake
Member
I went through this once and kept throwing shock at it, which honestly just made things drag on longer.
One thing that finally clicked for me was testing at the right time. After shocking, chlorine can look “fine” during the day but drop way lower overnight if it’s still chewing through contaminants. I started testing early in the morning before the sun hit the pool, and it showed the chlorine was getting used up faster than I thought. Until that overnight drop stopped, the cloudiness never really improved.
Another overlooked piece is what’s sitting on the floor. Even if it looks clean, fine dust and dead algae can settle into low spots and seams where brushing doesn’t fully lift it. I slowly vacuumed to waste instead of through the filter one time, and the difference was night and day. It removed stuff the filter just kept recirculating.
Also, if you’ve shocked multiple times close together, the water can temporarily look worse because everything is oxidized at once. At that point, less intervention actually helped me more. I stopped adding chemicals, ran the pump continuously, and let the filter do steady work instead of blasting it again.
Cloudy water is frustrating because it feels like nothing’s working, but most of the time it’s the after-effects of fixing the problem, not an active issue anymore. Once the chlorine demand settles and the fine debris is physically removed, clarity usually follows pretty quickly.
One thing that finally clicked for me was testing at the right time. After shocking, chlorine can look “fine” during the day but drop way lower overnight if it’s still chewing through contaminants. I started testing early in the morning before the sun hit the pool, and it showed the chlorine was getting used up faster than I thought. Until that overnight drop stopped, the cloudiness never really improved.
Another overlooked piece is what’s sitting on the floor. Even if it looks clean, fine dust and dead algae can settle into low spots and seams where brushing doesn’t fully lift it. I slowly vacuumed to waste instead of through the filter one time, and the difference was night and day. It removed stuff the filter just kept recirculating.
Also, if you’ve shocked multiple times close together, the water can temporarily look worse because everything is oxidized at once. At that point, less intervention actually helped me more. I stopped adding chemicals, ran the pump continuously, and let the filter do steady work instead of blasting it again.
Cloudy water is frustrating because it feels like nothing’s working, but most of the time it’s the after-effects of fixing the problem, not an active issue anymore. Once the chlorine demand settles and the fine debris is physically removed, clarity usually follows pretty quickly.
Abena Tesfaye
Member
If you shocked twice and it is still cloudy, it is usually a filtration issue, not a chlorine issue. I would check pH, clean/backwash the filter, brush the pool, and run the pump 24 to 48 hours. If it is still a light haze, try a small dose of clarifier. If you use floc, be ready to vacuum the settled stuff the next day.