Nothing is more inviting than a sparkling clean looking pool, but if you have unsightly brownish stains at the bottom of the pool, it gives you that icky dirty feeling. Not Maintaining your swimming pool can hurt the resale value of your home. The presence of Iron in your pool water can cause rust stains to form, and over time, the result will turn into corrosion and not only affect your pool water but corrode your pipes and pumps as well.
One way to avoid the iron build-up is to ensure you’re filling your pool with purified water and not healthy water. There is a good chance that your well water contains various minerals and trace metals. These contaminants can include arsenic, calcium, chromium, cobalt, copper, iron, lithium, Manganese, Magnesium, nickel, selenium, and zinc.
These contaminants can create hard water, which can lead to your filters and pipes being clogged. Also, when you have too much Iron in your pool, it can lead to bacteria growth. You can usually and visibly see the brownish-green tinted water.
You will know if its crystal-clear look chemically balances your pool. Therefore, it’s essential to test and balance your water chemistry frequently.
Once you have the rust and brown stained pool, the best method to rid you of this problem is to use Oxalic Acid. We have a list of steps you can take:
Swimming Pool Stain Cleaner
2. Raise pH to 6.8
3. Add an algaecide to the pool to prevent algae from growing while pH is at 0
use sodium thiosulfate to neutralize the chlorine
4. Shut the pool pump off; after 3 hours, the levels should be correct
5. Add about 28-30 Grams of Oxalic Acid forever 1000 Liters of water
6. Pour the acid in around the edges of the pool
7. Wait 1-2 hours
8. Switch filter to circulate and restart.
9. Expect the pool water to turn cloudy white.
10. Wait 24 hours with the pump running in circulate mode (Not filter!)
11. If the water is very cloudy, either switch the pump/filter back to Filter mode and leave the pump and filter running for a couple of days until the pool clears or backwash the filter, floc the collection run the filter overnight.
13. When the stains are removed, backwash the filter, switch back to filter mode.
14. Wait 24 hours
15. Start to increase the pH to 7.2
16. Increase the chlorine level back to 1-3ppm.
17. Check chlorine and pH once or twice a day and adjust as necessary
18. Keep the pH around 7.2 for two weeks, then increase back to 7.3 – 7.4