Green Swimming Pool Water In Above Ground Pool..Algae..Shock
(Clear Up A Green Pool eBook)
I have green swimming pool water in my above ground pool (5600 gal). I am assuming it is pool algae, as we had the same thing last year. I cannot get rid of it and do not have a vacuum either.
Is it necessary?
I have put shock n' swim in, algaecide, clarifier, super shocked it, chlorine tablets, swept the bottom as good as I could to stir up the water to help the filter do its job and flushed the filter out numerous times (full of algae).
What else can I do? The pool chlorine level seems to be almost non existent, which I don't understand as all the shocks I've given it the past 2 days.
HELP!!!Thanks for your question
It does sound like you have an issue with green pool water, but don't worry or panic. You can take care of it, kill the algae, and have a great looking and safe swimming pool.
First of all you need to understand that the pool chlorine is the product that kills pool algae. Pool algaecides are for preventative maintenance only, and even that's debatable. Be sure the chlorine level is kept within the proper range of 1.5ppm - 3.5ppm and the cyanuric acid (CYA) is between 20ppm - 50ppm.
I would recommend getting a Taylor Reagent FAS-DPD K-2006 test kit. It's the best on the market and used by most pool professionals. Your local pool store can order one or you can go online to purchase yours.
Water Testing Kit
Look over these pages:
Remove Swimming Pool Algae
Green Pool Water
Swimming Pool Algaecide
Next, get the pool pH level down to around 7.0ppm. Pool chlorine is more effective at this range.
Swimming Pool pH Levels
For your 5600 gallon pool I would recommend using sodium hypochlorite, liquid chlorine, for your pool shock.
The above links have charts to show how much pool chlorine you'll need to reach the super-chlorination level. You'll need about 2 gallons, but I'd go a little over, maybe 2.5 gallons. It's better to be over than under when shocking
a pool. Test the water after the shock to ensure you've reached the chlorine level of 12ppm - 15ppm. Don't be concerned if you go a little over.
Keep filtering 24/7 and backwash once per day. You wrote that you flushed the filter out, which I will assume you backwashed. If the pool filter is full of algae then it's doing its job.
After the shock your swimming pool water might be white or grayish in color. This is normal dead swimming pool algae and will be filtered out. I would highly recommend getting a good swimming pool vacuum.
Swimming Pool Vacuums
This will really help in getting the dead pool algae from the bottom of the pool. If you don't want to clog your pool filter, you can always vacuum to "WASTE". Just keep an eye on the water level. Keep the pool full and don't allow the water level to go below the skimmer. The pool pump might draw in air which will compromise the suction of the pump.
Try to keep the pool chlorine level above 5ppm as this will keep the algae away long enough for the chlorine to do its job. When algae dies it releases phosphates which the living pool algae feed on. By initially keeping the chlorine level above 5ppm you'll kill the other pool algae.
You also need to get your cyanuric (CYA) acid level up. This is done by adding either Dichlor powder or Trichlor swimming pool chlorine tablets. Dichlor to get it in there and Trichlor to keep the level constant.
Swimming Pool Chlorine Tablets
Adjust Your Swimming Pool Chlorine
Once the pool algae is gone and your water is clear, keep this link handy to know what your levels should be:
Swimming Pool Tips
It does take some time to clear up your green pool water. Be patient and your water will come around. I know this sounds a bit much, but it's not. Just remember:
*Get the pH pool level down to 7.0ppm
*Filter 24/7 and backwash
*Vacuum (eye on the water level)
Best of luck