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Red Sea Magnesium Pro - Reagent Refill Kit - R21416

Marsoni M251S
Sale price$19.99
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Get it in 3 business days with 1 day shipping. Friday, May 29
Red Sea Magnesium Pro - Reagent Refill Kit - R21416Red Sea's Magnesium Pro Test Kit is an advanced titration test, measuring the level of magnesium in your reef aquarium to an exceptionally high accuracy of 20 ppm. This test kit enables the accurate dosing of Red Sea's Reef Foundation C supplement (magnesium) which is part of the complete Red Sea Reef Care Program. Specifications: Test type: Titration Test range: Accuracy: 20 ppm Titrator included inside easy to use, single hand, high precision
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  • We offer a 30-day return/exchange service after receiving.
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4.0 ★★★★★
Based on 1049 reviews
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Verified Purchase
Stacey Lovejoy
Louisville, US
★★★★★ 2
Too big
The one size fits all was too big for me.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 10, 2026
R
Verified Purchase
Randy Deasy
Lowell, US
★★★★★ 5
Not to thick or thin well made
Size: Medium, Color: (601) Bittersweet Pink / Stone / Stone
I bought pink so as not to lose when doing laundry with my daughter who steels all socks lol!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
S
Verified Purchase
Stacey Cohick
Los Angeles, US
★★★★★ 5
Perfect
Size: X-Large, Color: (601) Bittersweet Pink / Stone / Stone
They were perfect
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 27, 2026
S
Verified Purchase
Susan Brown
Birmingham, US
★★★★★ 5
Very Comfortable!
Size: Medium, Color: (601) Bittersweet Pink / Stone / Stone
Very comfortable. Don’t slip off back of heal. Love the colors.
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Reviewed in the United States on March 25, 2026
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Verified Purchase
C. V.
Belleville, US
★★★★★ 5
😊
Size: Medium, Color: (601) Bittersweet Pink / Stone / Stone
These are really nice except I don’t like all the colors of them so I’m getting different ones same company just different colors. I don’t like the thick ones these are perfect.. 🤩
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Reviewed in the United States on February 24, 2026

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