Pool Algaecide

Pool algaecide and swimming pool maintenance tips. Best way to eliminate an algae swimming pool and avoid common mistakes to give you clear pool water.

Get the best pool water maintenance information for killing algae.

You can remove green swimming pool water, and lower your pool maintenance cost to give you the pool perfect for you.

Algaecides are mostly used as a preventative measure, although I've sometimes used them when I walked into a backyard and the pool had that “walk across it” look.

If you have ever seen the rows and rows for pool green water algaecides, you may have become overwhelmed. 

Do I Need A Pool Algaecide?

When Your Pool Water Is Green

Check your pool water chemistry and filtration system before using an algaecide. 

Pool Algaecide

You may just need to balance the water to clear up your pool. Pay attention to the pool pH level. You'll want to get it down to about 7.0-7.2.

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If you have a green algae swimming pool, and you’ll know if you have one, find out which kind of algae you have. Most of the time simply maintaining a high free chlorine level is enough to kill the algae. 

If you have black algae you'll need to rub chlorine tabs on the affected areas.  

Adjust your pool water chemistry, be sure you have backwashed your sand filter or DE filter, then shock your pool. If you have a cartridge filter be sure to clean it out well. You may want to wait a day or so to allow the chlorine to do its job.

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If you still have that "pool water green" problem, after a couple of days check to be sure you're properly shocking the pool. You may need an algaecide after that. Remember that an algaecide is not used for killing existing algae. 

The only algaecide I use and recommend is called a PolyQuat 60. This is very important. Many other kinds have metal, mainly copper, in them. You don't want to add anything else to the water. A PolyQuat 60 is a bit more expensive but well worth the investment.

Chart - Super-Chlorinate Your Pool

(Amount Needed to Reach 10 ppm)

Type of chlorine POOL GALLONS
1,000 5,000 10,000 12,000 15,000 20,000 25,000 50,000
Sodium Hypo 10 oz. 1 3/4 qts. 3 1/4 qts. 1 1/4 gal. 1 2/3 gal. 2 gal. 4 gal. 6 gal.
Lithium Hypo 4 oz. 1 1/4 lbs. 2 1/3 lbs. 3 1/2 lbs. 4 3/4 lbs. 6 lbs. 12 lbs 18 lbs.
Dichlor 2 1/4 oz. 11 oz. 1 1/3 lbs. 2 lbs. 2 2/3 lbs. 3 1/3 lbs. 6 3/4 lbs. 14 lbs.
Calcium Hypo 2 oz. 10 oz. 1 1/4 lbs. 2 lbs. 2 1/2 lbs. 3 1/4 lbs. 6 1/2 lbs. 13 lbs.

Remember the best pool algaecide in the world will not kill your algae issues. Pool chlorine shock is the only thing that will. A green algae swimming pool is a common issue, but don't worry. You have lots of great information here.

Using the best pool tips, the best pool algaecide, and understanding your pool’s chemistry is the best way to keep that algae far from your pool.

Happy Swimming 

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If you have a chemical related issue, please give the chemicals readings, type of filtration system, what you've done or are trying to do, etc..

Cyanuric Acid
Sand, Cartridge, DE Filter

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What Other Visitors Have Said

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Swimming Pool Algaecide Treatment 
What is the amount of Algaecide treatment I should use for my 20,000 gallons water swimming pool? And my swimming pool water was cloudy and then it turned …

Algaecide Overdose 
I have read several of your posts regarding algaecide overdosing. I believe I overdosed my pool with dimethyl benzyl ammonium chloride (from Dupont) at …

Too Much Algaecide And Got Burns 
My son recently got a very bad chemical burn from swimming in my in-laws pool. They live on a lake and my father in-law is always worried about algae …

"Soapy" Water After Using An Algaecide 
I just bought a round 20'x 48" above ground pool (cheap one). I set it up as per instructions and hooked up the pump, hoses and etc. After filling …

Switching From Baquacil To Chlorine 
I have an Omega Supersplash above ground pool. We use the Baquacil product but would like to switch to chlorine. The filter system uses the Starite …

Can Super Floc Remove Pool Algae? 
Will raising the pH level and adding Superfloc (that is supposed to coagulate waste to the bottom that can be vacuumed to waste) get rid of algae? …

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