Supports Fish During Stress
Helps restore electrolytes when koi and goldfish are under stress from water changes, clean-outs or seasonal transitions.
Blue Thumb Pond Salt
$26.99 - $49.49
Koi & Goldfish Care
Measured pond salt for electrolyte and slime-coat support
Blue Thumb Pond Salt is formulated for koi and goldfish during water changes, clean-outs, seasonal transitions and other stressful periods. It helps replenish electrolytes, supports the natural slime coat and provides label-guided control of common pond parasites.
Size options10 lb or 20 lb
CoverageUp to 2,000 or 4,000 gal.
Routine rate8 oz per 100 gal.
Made inUSA
Why Pond Owners Keep It on Hand
Helps Maintain the Slime Coat
Supports mucus production and the protective slime coat that forms an important part of a fish’s natural defenses.
Label-Guided Parasite Support
Helps control 80% of common pond parasites when applied as directed.
Choose the Size That Matches Your Pond
Choose by actual water volume, not surface area. Each package provides one full routine application at the listed maximum coverage.
10 lb Pond Salt
For ponds up to 2,000 gallons at the routine application rate.
- SKU: PB2743
- Package: Pail
- Coverage: Up to 2,000 gallons
20 lb Pond Salt
For ponds up to 4,000 gallons at the routine application rate.
- SKU: PB2873
- Package: Bag
- Coverage: Up to 4,000 gallons
Routine Application
Calculate Volume
Use the pond’s filled dimensions and average depth to estimate the true number of gallons.
Measure the Dose
Use 8 ounces of Pond Salt for every 100 gallons of pond water unless the package directs otherwise for the intended treatment.
Apply as Directed
Apply the measured amount exactly as instructed on the package and monitor fish and water conditions.
Track Future Additions
Salt remains after water evaporates. Before adding more, account for the existing salt level and water removed during changes.
Important safety note: Keep out of reach of children. Overapplication or abrupt changes in water conditions may injure aquatic life. Follow the package label and monitor fish closely.
Product Specifications
Product type: Pond salt and electrolyte treatment
Intended fish: Koi and goldfish
Routine rate: 8 oz per 100 gallons
10 lb coverage: Up to 2,000 gallons
10 lb SKU: PB2743
10 lb package: Pail
20 lb coverage: Up to 4,000 gallons
20 lb SKU: PB2873
20 lb package: Bag
Country of origin: Made in USA
Product Resource
Blue Thumb Retail Catalog
Review the official Pond Salt listing, size options and coverage table in our current product catalog.
Questions Before You Treat?
Our Sales/Tech Team can help you confirm pond volume, choose the right package size and review label-guided use before you add salt.
Frequently Asked Questions
Which size should I choose?
Choose the 10 lb pail for up to 2,000 gallons or the 20 lb bag for up to 4,000 gallons at the routine rate. If your pond is smaller, measure only the amount needed for its actual volume.
How much Pond Salt do I use?
The routine label rate is 8 ounces per 100 gallons. Calculate pond volume carefully, account for salt already in the water and follow the package directions for your exact application.
When is Pond Salt useful?
It is formulated to support koi and goldfish during water changes, pond clean-outs, seasonal transitions and other stressful periods. It also provides label-guided control of common pond parasites.
Is it safe for fish and aquatic plants?
Pond Salt is safe for aquatic life when used as directed. Because salt tolerance and existing salinity can vary, never exceed the label rate and ask our Sales/Tech Team if you have sensitive plants or are unsure what is already in the pond.
Can I use Pond Salt for a salt bath?
The product is labeled for salt-bath use in a separate, aerated treatment container. Salt baths are concentrated and time-sensitive, so follow the directions on the package exactly, monitor continuously and remove the fish immediately if it shows stress.
Do I replace salt after evaporation?
No. Water evaporates, but the dissolved salt remains. Account for the existing salt level and replace only the appropriate amount associated with water that was actually removed, following the package directions.
Is Pond Salt a substitute for diagnosing a sick fish?
No. Similar symptoms can have different causes. If fish are gasping, lethargic, injured or showing persistent visible symptoms, avoid repeated guesswork and consult an experienced aquatic-fish health professional or our Sales/Tech Team.
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