SKU: 42545730856

Reef Advantage Calcium 4kg

Sale price$220.28 Regular price$244.76
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Ships within 48 hours · Estimated delivery Jul 9 - Jul 14

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Description

Reef Advantage Calcium 4kgReef Advantage Calcium is a gentle (pH 8. 38. 6) specially formulated blend of ionic calcium aimed at restoring and preserving calcium levels similar to those in natural seawater. Calcium and carbonates play a crucial role in coral growth. A deficiency in either can halt coral development and lead to a swift decline in coral vitality. Additionally, Reef Advantage Calcium contains magnesium and strontium in ratios that reflect typical usage (100: 5: 0.

Reef Advantage Calcium is a gentle (pH 8.3–8.6) specially formulated blend of ionic calcium aimed at restoring and preserving calcium levels similar to those in natural seawater. Calcium and carbonates play a crucial role in coral growth. A deficiency in either can halt coral development and lead to a swift decline in coral vitality.

Additionally, Reef Advantage Calcium contains magnesium and strontium in ratios that reflect typical usage (100:5:0.1, Ca:Mg:Sr). This ensures that these vital elements are maintained along with calcium. Unlike limewater (kalkwasser), Reef Advantage Calcium does not have a harsh pH and will not reduce magnesium levels. When used as directed, it will not affect alkalinity.

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SKU: 42545730856

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Sarah Sofía Ortiz Campos
Grantham, US
★★★★★ 1
No recomiendo
Format: Paperback
Muy malo, no vine completo, además se demoró mucho más de lo que decía al momento de comprarlo. Solo aplazaban la fecha de entrega sin consultar cómo afectaba al cliente. Yo tuve que presentar el examen sin el libro, porque no llegó en la fecha que decía al comprarlo y después se cambió 3 veces la fecha, casi cumpliendo el mes.
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Reviewed in the United States on December 30, 2025
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Elaine li
Natrona Heights, US
★★★★★ 5
VERY EFFICIENT MATERIAL
Format: Paperback
It's the most efficient material to prepare the test.
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Reviewed in the United States on April 1, 2020
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ThereseHazzard
Fort Morgan, US
★★★★★ 5
All around helpful---worth the money!
Format: Paperback
This guide has been most helpful for all the folks I help prepare for the iTEP test! It gives insight into what each section of the test is looking for along with examples and great tips about actually TAKING the test. In the Writing and Speaking sections, it also gives sample scores and comments from the Master Grader which is very helpful too.
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Reviewed in the United States on August 9, 2019
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Thomas J. Shandorf
Fort Morgan, US
★★★★★ 5
Comprehensive, clear and coherent!
Format: Paperback
The iTEP Practice Guide combines a no-nonsense approach to the specific iTEP tests and at the same time offers exercises that task the student with what they need to know. Exercises not only serve the purpose of scoring well, but the overall approach is communicative competence. We use the text in our group and one-to-one classes with very positive--and lasting--results.
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Reviewed in the United States on July 23, 2019
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Sarah Sofía Ortiz Campos
Draper, US
★★★★★ 1
No recomiendo
Format: Paperback
Muy malo, no vine completo, además se demoró mucho más de lo que decía al momento de comprarlo. Solo aplazaban la fecha de entrega sin consultar cómo afectaba al cliente. Yo tuve que presentar el examen sin el libro, porque no llegó en la fecha que decía al comprarlo y después se cambió 3 veces la fecha, casi cumpliendo el mes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 30, 2025

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