Hi everyone,
I have been researching online to try and fix some stains in my pool that seem to be from metal stains but I need help troubleshooting a bit more. Here are the steps I have taken so far, along with a few pictures to help illustrate:
1. Suspected stains were from metals so I began the process of doing an Ascorbic Acid treatment (pump ran 24/7 for the entire process, about a week or more)
3. Pool started clearing up after about a 7-14 days or so but I kept getting algae growth, even after several backwashes, so I decided to clean the entire filter grid (found out it was caked in algae). Re-added DE powder when it was all clean.
4. Next day the pool was pretty much perfectly clear. Started to bring chlorine levels up SLOWLY with liquid chlorine only.
5. Eventually got chlorine levels to a normal point and didn't get any stains coming back. I thought I was good to go at this point. Also added a bottle of PolyQuat algaecide from the pool store (60% polyquat) to help prevent any more algae as I brought chlorine up.
6. It is now about a month later, noticed stains slightly coming back so I bought a bottle of HASA Super Stain out, thinking this should be a good sequestering agent, and add the whole bottle. Doesn't seem to make anything better.
7. A few days after adding the HASA Super Stain out the pool is back to looking as bad as it started off as, maybe even worse in spots.
After dealing with all of this, I decided to shell out the money for a legit test kit, K-2006, (which I should have done a looooong time ago) and see what's up with the pool. All levels are coming in at their normal ranges EXCEPT CYA, which is at 150+.
I clearly have been using Trichlor tabs way to long and have stopped using them. The problem now is that my chlorine levels are too low to kill any algae. I was also hesitant to add too much chlorine and cause any suspended metal ions to re-stain (which at this point doesn't matter, the stains are back and in full force).
I am now questioning if these stains could be from algae or if they are in fact metals. They don't get much better by brushing, even with a stainless steel/nylon brush. But they also only got worse after adding the HASA super stain out.
Any help is appreciated. Let me know if you need more info and I'll do my best to get it.
Pool equipment:
~20k gallons
Pentair VS Pump
Hayward 36 DE Filter
City water
Screened lanai enclosure
I have been researching online to try and fix some stains in my pool that seem to be from metal stains but I need help troubleshooting a bit more. Here are the steps I have taken so far, along with a few pictures to help illustrate:
1. Suspected stains were from metals so I began the process of doing an Ascorbic Acid treatment (pump ran 24/7 for the entire process, about a week or more)
- Balanced pool water (chlorine to near 0 and PH to 7.2)
- Added pool store sequestering agent, two quarts/bottles worth
- Added 2-3 pounds of pure ascorbic acid powder bought off Amazon. This was added a bit at a time until I could notice the stains getting better.
- Did NOT add an algaecide, which I regretted....
3. Pool started clearing up after about a 7-14 days or so but I kept getting algae growth, even after several backwashes, so I decided to clean the entire filter grid (found out it was caked in algae). Re-added DE powder when it was all clean.
4. Next day the pool was pretty much perfectly clear. Started to bring chlorine levels up SLOWLY with liquid chlorine only.
5. Eventually got chlorine levels to a normal point and didn't get any stains coming back. I thought I was good to go at this point. Also added a bottle of PolyQuat algaecide from the pool store (60% polyquat) to help prevent any more algae as I brought chlorine up.
6. It is now about a month later, noticed stains slightly coming back so I bought a bottle of HASA Super Stain out, thinking this should be a good sequestering agent, and add the whole bottle. Doesn't seem to make anything better.
7. A few days after adding the HASA Super Stain out the pool is back to looking as bad as it started off as, maybe even worse in spots.
After dealing with all of this, I decided to shell out the money for a legit test kit, K-2006, (which I should have done a looooong time ago) and see what's up with the pool. All levels are coming in at their normal ranges EXCEPT CYA, which is at 150+.
I clearly have been using Trichlor tabs way to long and have stopped using them. The problem now is that my chlorine levels are too low to kill any algae. I was also hesitant to add too much chlorine and cause any suspended metal ions to re-stain (which at this point doesn't matter, the stains are back and in full force).
I am now questioning if these stains could be from algae or if they are in fact metals. They don't get much better by brushing, even with a stainless steel/nylon brush. But they also only got worse after adding the HASA super stain out.
Any help is appreciated. Let me know if you need more info and I'll do my best to get it.
Pool equipment:
~20k gallons
Pentair VS Pump
Hayward 36 DE Filter
City water
Screened lanai enclosure
Last edited: