And Why It Matters for Your Spa Cover
Maintaining proper spa water chemistry does more than protect your water — it protects your spa equipment and your spa cover.
Bromine is a popular sanitizer for hot tubs because it remains stable at higher temperatures and is less irritating than chlorine.
Here’s how to manage it properly.
Ideal Bromine Levels
Maintain bromine between:
3.0 – 5.0 ppm
Test weekly using bromine-specific test strips.
If levels fall below 3 ppm:
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Verify tablets are present in floater
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Adjust floater setting
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Use non-chlorine shock to activate bromine
If levels are too high:
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Remove floater for 24 hours
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Retest
pH Balance
Ideal pH range:
7.4 – 7.8
Low pH (< 7.0):
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Can cause corrosion
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Damages heater components
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Irritates skin
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Accelerates vinyl deterioration
High pH (> 8.0):
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Causes cloudy water
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Promotes scale buildup
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Reduces sanitizer efficiency
Keeping pH balanced protects both your spa equipment and the underside of your spa cover from chemical damage.
Total Alkalinity
Ideal range:
80 – 120 ppm
Alkalinity stabilizes pH.
Low alkalinity:
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Causes pH swings
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Leads to equipment wear
High alkalinity:
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Causes scaling
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Increases acid demand
TDS (Total Dissolved Solids)
Test every few months.
If levels exceed 2500 ppm:
Drain and refill the spa.
High TDS reduces sanitizer efficiency and increases chemical demand.
Weekly Maintenance Checklist
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Test bromine, pH, and alkalinity
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Shock weekly (non-chlorine shock recommended)
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Clean filter monthly
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Add clarifier as needed
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Drain spa every 3–4 months
Always add chemicals with pumps running.
Wait 15 minutes between chemical additions.
Why Chemistry Matters for Your Spa Cover
Improper chemistry directly affects spa cover life:
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High sanitizer levels increase vapor exposure
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Chemical fumes degrade vinyl
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Low pH accelerates material breakdown
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Poor water balance increases moisture accumulation inside covers
A properly balanced spa:
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Reduces chemical vapor damage
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Extends vinyl lifespan
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Protects stitching and seals
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Improves overall cover durability
Maintaining chemistry is one of the simplest ways to protect your investment.
Additional Tips
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Dedicate swimwear for spa use (avoid detergent residue)
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Use foam reducer only when necessary
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Keep the spa cover on when not in use
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Use 303 Protectant on vinyl every 1–2 months
If you have questions about how water chemistry affects your spa cover, contact Spa Covers Etc. We’re happy to help.