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Ships within 48 hours · Estimated delivery Jun 22 - Jun 27
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Description
Red Sea Reef Foundation C SupplementMaintaining balanced levels of the Foundation Elements (Ca KH & Mg) creates optimal water conditions for promoting strong and healthy coral growth. Reef Foundation C is a Magnesium complex for balanced formation of Coral Skeleton Benefits: 1. Promote strong and healthy coral growth. 2. Balance formation of the coral skeleton. Safety: Caution: Keep out of reach of children Use Instructions: 1g will raise the Mg level of 100 liters (25 gal) 1. 34ppm. 1
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.8 ★★★★★
Based on 764 reviews
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Product Reviews
★★★★★ 5
Worked good for me
Color: Multicolor
Used these for kids to use on a balloon launcher as alternative to water balloons they are good enough for that, can’t say how well they work playing tennis?
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Reviewed in the United States on January 31, 2026
★★★★★ 5
Nice for Operation Christmas Child
Color: Multicolor
I purchased these for Operation Christmas Child. Nice colors. As expected. I recommend.
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Reviewed in the United States on December 9, 2025
★★★★★ 4
Love the colors
Color: Multicolor
These last a few days at my house, but I have a big dog
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Reviewed in the United States on April 13, 2026
★★★★★ 5
hard to see darker colors when coming at speed
Color: Multicolor
big box of cheap functional tennis balls.
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Reviewed in the United States on December 15, 2025
★★★★★ 5
they squeak
Color: Multicolor
my dog loves these balls because they squeak unlike other brands.... and the 2.5 inch is a good size for a med to large dog... only issue is i go through a ball a day... because my Pit loves to squeak the life out of them.... good for about 2000 squeaks....
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Reviewed in the United States on December 6, 2025
