So Lost Mustard Algae?


New member
Jun 3, 2020
Orange Texas
Is this Mustard Algae? The people at Leslie's barely looked at my pictures and sold me the cure. Saturday my chlorine level was 20. Also they told me I need to shock to pool, its already at 11.20200617_143027.jpg20200617_111446.jpg20200617_111442.jpg

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
Well, I think we an rule out MA. I will also reiterate that pool store testing and advise will almost always be disappointing. But what I suspect based on the color of your water and the iron reading from that printout is the color you are seeing is from iron. Are you on a a well?


New member
Jun 3, 2020
Orange Texas
City Water. This is my water today after vacuuming. I did not treat for mustard algae.


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Bronze Supporter
Jun 1, 2018
Hernando, Ms
Pool Size
Salt Water Generator
SWG Type
Intex Krystal Clear
Welcome to tfp!
Seems like @Texas Splash pegged it!
Metals results are generally the only poolstore results we give any advice off of here.
This is a great video explaining our methods a little 😊


Mod Squad
TFP Expert
Platinum Supporter
LifeTime Supporter
In The Industry
Apr 1, 2007
Sebring, Florida
The debris I see on your pool floor is dead algae. Looks like your large dose of chlorine killed it and your filter cleared the pool water.

It will likely come back soon if you let the chlorine get too low. Please read "The "ABC's of Pool Water Chemistry" up in Pool School and look at doing your own testing and staying out of a pool store who's results simply cannot be trusted,
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