Knowledge Base
Pool Troubleshooting
Expert advice for pool algae removal, stain identification, and water chemistry troubleshooting. Get results-oriented help from United Chemical.Product Guides
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Recent Articles
How to Use No Dran Acid Wash: No Drain Pool Guide
Objective This advanced guide explains how to safely perform a complete acid wash on your pool to eliminate severe, stubborn stains and thick calcium scale—all without the massive expense or risk of draining your water using No Dran Acid Wash™. The ...Copper Stains Caused by Pool Ionizers and Mineral Systems
Objective This guide explains why copper ionizers and mineral systems cause bright teal or black staining on pool surfaces (and green swimmer's hair), and provides the exact steps to safely lift the stains while bypassing your equipment. The Hidden ...Calcium Scale in Pool Heaters
Objective This guide helps you diagnose calcium scale buildup inside your pool heater and implement the exact chemistry adjustments needed to protect your expensive equipment from permanent damage. The Danger of the "Hot Zone" If your gas pool heater ...Water Changed Color After Shocking
Objective This guide helps you diagnose "metal flashing"—a phenomenon where pool water suddenly changes color after adding chemicals—and provides the exact steps to sequester the metals and restore crystal-clear water. The Chemistry of the "Flash" It ...Pool Filter Blowing Dirt Back Into the Pool
Objective This guide helps you diagnose why your pool filter is returning dirt, sand, or cloudy water back into the pool through the return jets, and provides the steps to repair your compromised filtration media. Understanding Filtration Failure ...
Popular Articles
Vinyl Pool Liner Stains (Vinyl Plague)
Objective This guide helps you diagnose mysterious dark stains on the bottom of your vinyl liner pool and provides the specific chemical steps needed to treat soil fungus (often called "Vinyl Plague"). The Truth About Vinyl Plague If you own a vinyl ...Poly60 Treat™
Objective This guide provides the official instructions for using Poly60 Treat™ to effectively control and prevent the growth of algae in your swimming pool, exterior whirlpool, or hot bath. The Benefits of a Preventative Algaecide While chlorine is ...Persistent Mustard Pool Algae
Objective This guide helps you identify stubborn mustard algae (yellow algae) and outlines the targeted chemical and physical steps to eradicate it from your pool and prevent its return. Educational Context: The Resiliency of Yellow Algae If you feel ...No Mor Problems®
Objective Learn how to drastically reduce your maintenance labor and chemical demand by adding No Mor Problems to your weekly routine. This product guarantees a crystal-clear pool with half the brushing. The Power of pH-Independent Protection ...Iron Stain Treat™
Objective This guide provides the necessary steps to safely remove and prevent iron and rust stains from any pool surface using Iron Stain Treat™. Why Iron Stains Occur Iron and rust stains typically appear as brown, rusty, or yellowish ...