How To Clear A Green Pool FAST | Swim University

Is your pool water green? The good news is you don’t have to drain your pool and start over to get rid of it. Here’s a quick guide on how to kill pool algae fast and keep it from coming back

⏰ Timestamps:
00:00 - Introduction to How To Clean A Green Pool
00:31 - What Causes Green Pool Water?
01:00 - How To Fix Green Pool Water in 6 Steps
01:13 - #1. Brush Pool Walls and Pool Floor
01:44 - #2. Test Alkalinity and pH
02:38 - #3. Shock Pool with Chlorine Shock
03:59 - #4. Run Filter for At Least 8 Hours
04:57 - #5. Clean Your Filter
05:15 - #6. Test Water and Adjust Chemicals
05:41 - How To Stop Pool Algae from Returning

Swim University is making pool care easy. Each year, we continue to help more people with water chemistry, cleaning, and troubleshooting. We know taking care of a swimming pool can be difficult, and it’s hard to find a trusted source of information. We get it! This is the reason we created Swim University.

[SwimUniversity]

We hope this helps you clear up your green pool! If you need more help avoiding algae, be sure to grab the free Pool Care Cheat Sheet at 👍

[colereedy]

Just want to say thank you so much for these videos and this one specifically. We are first time pool owners as of this past May and the previous homeowners left the pool nice and green for us when we opened it. I had no idea how to begin maintaining a pool in good condition let alone a pool that already had something wrong with it. I studied up and Swim University was a huge part of my learning. It did end up taking me a couple of weeks for me to get the pool chemistry balanced, cleaned, and crystal clear blue, but I'm sure it would have taken much longer and cost me a lot more money to get it cleared up without these videos. We have been enjoying and maintaining the pool with no issues since. Thanks so much!

[stevenjames]

“No Mor Problems” is the best thing I’ve found in the last 10 years. It’s amazing

[beckwil]

You are amazing!!!! EVERYONE, tune into Swim University for EXCELLENT advice.
I own an in ground pool that is in its 36th summer and other than tiles having fallen off it’s in pretty good shape.
Two family retrievers decided to run across the vinyl cover every time they got out back this past winter. Needless to say when we removed the cover the water was the deepest green imaginable. I was beside myself as the water is usually clear with a few leaves in the bottom. I was really worried that I wouldn’t be able to clear it up. I stumbled across this video and after 3 applications of shock as you described here, my pool is crystal clear. For years I have agonized with the algae issue and had a hard time controlling it. Your information was EXACTLY the remedy. I cannot thank you enough. You are the

[GiannaXylia]

Thank you for recording this. New underground pool owners and we need all the tips and feedback we can get. We want to keep up with the pool for our daughters 🤞🏽.

[Denise-jtsr]

Hi! First time pool owners. We have an 8, 000 gallon above ground pool with a cartridge filter. Your videos have been so helpful!Came home to green water after being gone for the weekend and there had been a thunderstorm. Removed debris, brushed sides and pool bottom. Tested water, all levels were good except chlorine, of course. Did a double shock dose at night, ran filter for 24 hours, still green. Going to try it again per this video. Thank you so much for sharing your knowledge!!

[micheleperry]

Thank you so much for helping me "ungreen" my pool. I did exactly what you advised and it is beautiful now (wish I could add a picture). I actually went for a swim yesterday. Again thank you!!!

[nsrlegaltech]

Thanks for producing this video especially- a short term guest left pool filter off for seven days and my immaculate pool went to green. Recovered it in a weekend with these instructions.

[marij.]

THIS HAS BEEN THE MOST HELPFUL AND MOST UNDERSTANDING VIDEO IVE SEEN... THANK YOU SOOO MUCH FOR THIS.

[whatafarce]

Thank you for the very clear instructions on how to clean a green pool! Excellent advice and easily understood! I'm curious about why you don't recommend a phosphate remover to keep algae from growing. Phosphates are the sole food source for algae and once you get rid of them.... NO MORE ALGAE!

[officialqueenrek]

Yay thanks I'm kind of getting it now! I was about to give up and thought I had made a bad purchase and had a terrible idea!! Thank u for making it simple!!👍🤗

[imbrah]

Thank you. Great info. We were in Montana for 2 weeks and son added chemicals but didn't add chlorine. I forgot to leave it out. Now I have a green pool. I'll get it with your advice!

[veronicacameron]

Thanks for this amazing video. I’m on year two of maintaining our pool on my own because of your videos!

[christianlane]

Tremendously helpful and quick with explanations. 👍

[loucatozzi]

I tried this method last year with great success.

However this year I left the pool (10K gal. abovegrond) unattended for two weeks during 100 degree weather and came back to a frog pond. I tried 4 bags of shock with no change in color. Two days later I tried 4 bags, again with no change. Last night I tried 5 bags, still nothing.

At this point it would have been cheaper to drain and refill the pool from scratch, which is what I'm doing now.

Followup two weeks later: I drained the pool, sanitized the liner and stairs as best I could and refilled with fresh water. After it refilled I shocked again and then added clarifier as it was still cloudy grey. Now I have a crystal clear pool again finally. I do not know what got into my pool water while I was away but the lawn looks great now after watering it with 10K gallons of pool water.

[bradleymarshall]

Thanks for this. Stupidly went out and bought algaecide to sort it out but luckily saw this before I'd used it. Took it back and swapped for shock. Never thought I'd be so happy to see my water a cloudy blue!

On the home stretch now. I'm worried my chlorine levels are going to be off the charts, as soon as this settles down the cover goes on for winter.

[joshuarodriguez]

This is lit, way easier than i thought

[bexaminer]

Ok. Good video. I screwed up and let my pool get out of control. I guess I've done it before over the years, but I'm on it. Looking forward to getting this handled. Simple process so I have confidence that it will work.
Thanks.

[johnedwardfardal]

Thanks for the video- great length and was a good tutorial "pool basics for dummies'.

[gmontenegro]

Soon after adding the chlorine, put the pool into filter mode? Not recirculate?