Keeping pH at 7?


Well-known member
Jun 13, 2018
My fill water has a pH of 7 and has a good amount of iron. I filter out some of the iron but it still gets in there. If I keep my pH at 7, the iron doesn't cause stains and the vinyl stays stain free and water is clear. Whenever I bring it up to say 7.4, or above the Iron in the water starts to stain. I can deal w/ the stains and I can also use poly-fill to filter out the iron....but iron comes back w/ new fills so I'm finding it easier to just keep the pH at 7. What if any issues could I have keeping water pH of 7? (vs 'ideal of 7.4)


Mod Squad
LifeTime Supporter
Jan 17, 2012
Evans, Georgia
Vinyl tends to get brittle with too low pH. I'm not sure that 7.0 qualifies as that though? I think I would try to aim for at least 7.2 pH .

Remember that the pH scale is logarithmic and not linear.

Maddie :flower:
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