So, You Have an Algae Prob­lem (Sorry!)

Here’s how it hap­pened and here’s what you can do to get rid of algae.

Com­mon “green” algae are micro­scopic organ­isms that float in your pool or cling to the walls. In both salt and fresh water, algae grow tem­per­a­tures above 85°F and it can even “bloom” overnight. It doesn’t mat­ter if your pool or spa is clean—the spores are enter­ing by rain, wind, crit­ters, pool toys or swim­suits. Not only unsightly, if left unchecked, algae can clog fil­ters and cre­ate sur­face damage.

Step 1: Vac­uum Your Pool. Often, pool own­ers try to use their auto­matic cleaner to blow it out. This can make the prob­lem worse by blow­ing the algae all over your pool. To best remove algae, vac­uum it man­u­ally. Get­ting rid of the algae this way will reduce the amount of time it takes to kill and clear the algae bloom in the next step.

Step 2: Shock Your Pool.  T“shock”. Shock is a gran­u­lar form of highly con­cen­trated chlo­rine, which quickly raises the chlo­rine level of the swim­ming pool water and makes the pool water con­di­tions unliv­able for any­thing organic–thus, algae quickly dies. The “main­te­nance” amount of most swim­ming pool shock is 1 lb./10,000 gal­lons. Fol­low the manufacturer’s dosage sug­ges­tion for killing algae. Dis­solve chlo­rine pool shock on in a large bucket of water before it is added to the swim­ming pool.

Step 3: Don’t Swim Right Away. Don’t use the pool until  the algae is dead, and the chlo­rine level is back in the safe range of 1–3 ppm. Keep your pool fil­ter sys­tem  run­ning as you add the shock, and keep it run­ning 24 hours a day until all signs of algae have com­pletely left the pool.

Step 4. Mon­i­tor the Fil­ter.  Keep an eye on your pool fil­ter sys­tem, and clean the fil­ter each time the pres­sure rises 10 psi. above nor­mal oper­at­ing pres­sure. Dead algae can quickly dirty the fil­ter, so clean it frequently.

Step 5. Vac­uum Again. Once the algae is dead it will turn white or gray. When you can no longer see green algae in your pool, vac­uum it throughly and back­wash or clean the pool fil­ter to make sure nothing’s trapped inside.

Step 6. Watch Your Chem­i­cal Lev­els.  Algae and other harm­ful bac­te­ria are almost imme­di­ately destroyed in chlo­rine lev­els of 1 ppm or higher. Likely you had an algae issue by allow­ing the level to drop lower. We always rec­om­mend test­ing your pool water fre­quently and adjust­ing to main­tain a clean and safe swim­ming pool.

If the algae sit­u­a­tion doesn’t improve after a day or so, add a sec­ond dose of chlo­rine pool shock at the increased rate.

Or, as always, give us a call if you have any questions.




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