Black Algae

JasonLion

TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
37,880
Silver Spring, MD
Welcome to TFP!

About half of the people who think they have black algae, actually have some other problem. Could you tell us why you think you have black algae?
 

257WbyMag

TFP Expert
LifeTime Supporter
Feb 23, 2008
5,061
Denton, TX
Welcome to TFP!

Black algae is persistent and takes dedication to get rid of, but it is not an indication to get your pool acid washed. Acid washing is indicated for cases of mineral scaling (even this is arguable) but not for algae eradication.

Try reading Defeating Algae to get you pointed in the right direction. Basically, you need high levels of chlorine, water circulation, and lots and lots of brushing.

Have you read Pool School yet? There is much information to be had there. When reading it, you'll begin to understand why you got algae in the first place, how to get rid of it, and how to never have it again.
 

dmanb2b

TFP Expert
LifeTime Supporter
Apr 4, 2009
3,734
NY
Welcome to TFP....Read up on pool school as suggested. You'll need to raise your FC up to shock level, hold it at shock level and start brushing all the nooks and crannies.
 

Jkmireles

Member
Jul 1, 2010
5
I read the Pool School on fighting algae, is there anything more specific to black algae? Is there a process I should follow?
 

dmanb2b

TFP Expert
LifeTime Supporter
Apr 4, 2009
3,734
NY
Nope...shock and scrub. But from your other thread, if you are draining your Pool...just take care of it then...bleach will kill it if it organic...I would think the acid would do a number on it too if you go the route of an acid wash. Question though...can you give us some back ground...why do you want to drain/acid wash the pool?
 

frustratedpoolmom

TFP Expert
LifeTime Supporter
In The Industry
May 20, 2007
12,177
SWSuburban Chicago, IL
The trick with Black Algae is the brushing - they have a tough outer shell that is resistant to chlorine. By brushing it, you knock the heads off so the chlorine can attack the insides. The outer layer can re-establish so you have to brush daily if not twice a day. The pool store will try to sell you a bunch of various 'treatments' which won't help and will likely make the situation worse. So just remember, chlorine and brushing. Lots of elbow grease. :)
 

Other Threads of Interest