Iron it out!


Gold Supporter
May 27, 2019
Houston, TX
I believe I have iron stains in the pool. Now the season is over, I plan to put use Ascorbic Acid method into play.

#1) Before I do this, I want to make sure that the stains are indeed iron. We get "brown" deposits in the toilet tanks. And they appear to be fine iron/rust looking stuff.

Here is the report from my water supply

The Brown/Yellow stains in the pool are light and spread all over.

So, once I put the acid in and the stains come up, the iron is back in the water. I feel like that would be the time to drain the pool and refill. But as you see, there is some iron in the water. Otherwise, how do I get the iron OUT of the water. I see mention of Jack's magic potions. And I'm not opposed to killing a set of old cartridge filters if this is the better way to get the iron out than refilling.



Gold Supporter
May 27, 2019
Houston, TX
At what level is Iron a problem? We have 0.018 ppm. BUT...

Sometimes when they flush our system we get a brown dust in the water.


Gold Supporter
TFP Guide
Jul 21, 2013
Northern NJ
Pool Size
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
If you have visible iron then good chance filtering your fill water will help remove it.

Iron accumulates and you have lots of evaporation. So over time your 0.018 ppm iron fill water can become 1 or 2 or 3 ppm in the pool. Adding chemcials that suddenly raise the pH is the type of thing that can cause iron to precipatate out fo the water and stain the pool surfaces.
Thread Status
Hello , There was no answer in this thread for more than 60 days.
It can take a long time to get an up-to-date response or contact with relevant users.