Source Water and Refill Water
Understand what your fill water brings into the pool before you keep fighting the same hardness, metal, or TDS problem forever.
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Guidance provided at best effort for educational purposes.Read Terms →
Test the water you are adding
You cannot diagnose long-term drift without knowing what the refill water contains.
Use source water to explain recurring problems
Sometimes the pool keeps drifting because the refill water keeps reintroducing the same issue.
Treat wells and disasters carefully
Private well water and post-flood water situations need more caution, not less.
Resources
Source water pre-treatment
Use the pre-treatment guide for hose-end filters, alternate fill sources, softened-water caveats, and repeat-fill strategy.
EPA secondary drinking water standards
EPA guidance on nuisance metals and water-quality characteristics such as iron, manganese, copper, chloride, and TDS.
EPA well-water contaminants guidance
EPA overview of potential well-water contaminants and why private-well owners need testing and source awareness.
EPA protect your home's water after disasters
Useful when a flood or disaster may have compromised the refill-water source.
Explore More
Use hose-end filters, alternate fill sources, softened-water caveats, and repeat-fill strategy intentionally when refill water keeps reintroducing the same burden.
Plan staged water replacement for CYA, CH, salt, metals, or contamination without turning a chemistry correction into a structural mistake.
Understand FC/CYA, pH, alkalinity, calcium, and CSI without turning pool care into folklore.