SKU: 933397974

Reef Nitrogen 250 ml

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Ships within 48 hours · Estimated delivery Aug 26 - Aug 31

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Description

Reef Nitrogen 250 mlNitrogen Supplement for the Reef Aquarium Delivers Nitrogen in a fully measurable form Concentrated 25,000 mg L Nitrogen (110,750 mg L Nitrate) Nitrogen is a vital element necessary for metabolic functions, protein formation, and the development of corals and macroalgae. Studies indicate a tightly regulated nitrogen cycle in reef environments where concentrations are elevated in micro zones adjacent to the corals (Radecker 2015, Wiedenmann, 2023)

Nitrogen Supplement for the Reef Aquarium

Delivers Nitrogen in a fully measurable form

Concentrated 25,000 mg/L Nitrogen (110,750 mg/L Nitrate)

Nitrogen is a vital element necessary for metabolic functions, protein formation, and the development of corals and macroalgae. Studies indicate a tightly regulated nitrogen cycle in reef environments where concentrations are elevated in micro-zones adjacent to the corals (Radecker 2015, Wiedenmann, 2023) compared to the surrounding waters.

It is crucial to maintain nitrogen levels in conjunction with phosphorus levels to promote optimal growth and vibrant coloration of corals and macroalgae. Supplementing with inorganic nitrogen offers a precise method for boosting nitrogen without introducing phosphate or dissolved organics. A standard nitrate test will detect all nitrogen forms provided by Reef Nitrogen™. Reef Nitrogen™ is perfectly compatible with an aquavitro® sentia™ dose doser for maintaining nitrogen at a steady concentration tailored to your aquarium's specific needs. Additionally, Reef Nitrogen™ can be dosed manually with ease. Ideal nitrogen levels can vary but typically fall within the range of 1 – 2 mg/L (4.4 – 8.9 mg/L nitrate). Utilize Seachem’s Reef Phosphorus™ to establish a harmonious balance between nitrogen and phosphorus levels for the best outcomes.

Shipping Notes
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Exchange/Return Notes
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SKU: 933397974

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4.9 ★★★★★
Based on 22 reviews
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Jennifer
New York, US
★★★★★ 5
Highly Recommend.
Size: 1.7 Fl Oz (Pack of 1), Size: 1.7 Fl Oz (Pack of 1)
Excellent sun protection with a lightweight, non-greasy formula. It feels great on the skin and has become a staple in my daily routine. Will buy again!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
M
Verified Purchase
May
Lake Worth, US
★★★★★ 3
Terrible white cast
Size: 1.7 Fl Oz (Pack of 1)
You will look like you just got blasted by Jack Frost in the middle of the summer. This sunscreen could double as a hair identifier from the way it clings to each strand, leaving an incredibly noticeable white residue. I am very fair and on my skin itself the white cast is much less obvious/fades, my eyebrows on the other hand? Frostbitten. Snow swept. Bringing to mind polar bears and penguins. It's an alright sunscreen. Does the job. Does not look good while doing it.
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Reviewed in the United States on March 18, 2026
C
Verified Purchase
Courtney
Natrona Heights, US
★★★★★ 5
Great Product
Size: 1.7 Fl Oz (Pack of 1)
Most importantly, this stuff works! And I absolutely love that it’s not greasy. My face isn’t shiny or slick when i apply it. I’ve had no issues with my skin tolerating this sunscreen.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
R
Verified Purchase
Rachel Chavez
Grantham, US
★★★★★ 5
Great daily sunscreen with lightweight feel
Size: 1.7 Fl Oz (Pack of 1), Size: 1.7 Fl Oz (Pack of 1)
I’ve been using this sunscreen daily and I really like it. It feels very light on the skin, absorbs quickly, and does not leave a greasy or heavy feeling. It also works well under makeup and does not cause breakouts. I feel my skin is well protected from the sun and it’s gentle enough for everyday use. I highly recommend it for anyone looking for a reliable sunscreen.
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Reviewed in the United States on May 19, 2026
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Verified Purchase
Yeimy santos
Pawtucket, US
★★★★★ 5
Great for oily acne-prone skin
Size: 3 Fl Oz (Pack of 1)
I have oily, acne-prone skin, and this sunscreen has worked really well for me. It doesn’t feel overly greasy or too dry, and it sits nicely on my skin without making my face feel heavy. I’ve been using it for a long time, and honestly, it’s the only sunscreen I keep going back to because it works so well with my skin. It feels comfortable for daily use and gives good protection without causing extra breakouts for me.
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Reviewed in the United States on May 16, 2026

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