Sera GH-Test-15ml[Volume - 15ml]
SKU: 29093372124

Sera GH-Test-15ml[Volume - 15ml]

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Description

Sera GH-Test-15ml[Volume - 15ml]sera gH Test FRESH WATER, PONDWATER TESTINGCARE It simplifies the process of tracking total hardness levels for around 420dGH. If the GH values are too low, we suggest using sera mineral salt. To decrease high total hardness, mix in R O water. For producing softer water, consider adding sera blackwater aquatan or filtering through sera super peat. Directions for use: Shake the reagent bottle thoroughly before use! Avoid letting the water being tested

sera gH-Test FRESH WATER, PONDWATER TESTINGCARE

It simplifies the process of tracking total hardness levels for around 420°dGH. If the GH values are too low, we suggest using sera mineral salt. To decrease high total hardness, mix in R/O water. For producing softer water, consider adding sera blackwater aquatan or filtering through sera super peat.

Directions for use:

  • Shake the reagent bottle thoroughly before use! Avoid letting the water being tested come in contact with aquarium or pond water!
  • 1. Rinse the measurement vial with the water to be tested multiple times, then fill it to the 5 ml mark. Wipe the outside of the vial to dry.
  • 2. Add the reagent drop by drop. Gently shake the vial after each drop, until the color transitions from red to brown and finally to green.
  • 3. The quantity of drops used represents the total hardness (in °dGH). For example, 5 drops equal 5°dGH.
  • 4. Cleaning: Rinse the vial thoroughly with tap water before and after each test. Immediately close the reagent bottle after use. Store it at room temperature and away from light. Keep it locked up and out of children's reach. For testing ornamental fish aquariums and pond water only.

US Information for use

Most ornamental fish come from regions where the soil is low in minerals. However, in many other parts of the world, the opposite is true. Rainwater leaches calcium and magnesium from the soil, resulting in hard water. With the sera gH-Test, you can swiftly assess the precise total hardness. Understanding natural conditions aids in selecting the ideal fish species for a community aquarium and is essential for successful breeding. To reduce high total hardness levels, mix in R/O water. Using a combination of sera aquatan and sera blackwater aquatan or filtering through sera super peat will help achieve soft water, which is necessary for many South American fish (such as those from the Amazon basin).

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SKU: 29093372124

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Amazon Customer
Louisville, US
★★★★★ 5
The History Teacher I Always Wished For
Format: Hardcover
With his trademark wit and his eye for those wonderfully absurd details that most historians tend to overlook, Metaxas drew me deeply into the story. I found myself laughing out loud one moment and profoundly moved the next. The tiny anecdotes and humorous asides were not distractions at all — they were precisely what made these towering figures suddenly feel human and unforgettable. Eric makes these historical figures flesh-and-blood again. He brings both heroes and villains vividly to life in a way that makes the drama of America’s birth feel immediate, thrilling, and deeply personal. In short, Eric Metaxas is the history teacher I always wished I had. At 600 pages, this book reads with the ease and momentum of a paperback novel, yet carries extraordinary depth and scholarship. In the end, I came away with a renewed love for American history and a deeper gratitude for the souls who made this great country possible.
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Reviewed in the United States on June 2, 2026
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John Zmirak
Massapequa, US
★★★★★ 5
A fun, inspiring, thought-provoking read.
Format: Kindle
A witty, learned page-turner, replete with wacky anecdotes but suffused by wisdom and patriotic love. Metaxas shows how the biblical view of the human person made America possible, and weaves throughout the story pieces of evidence that Providence actively aided the pious patriots against their cynical, post-Christian enemies in Britain. I devoured this book in 72 hours, and now I want to go back and read it again.
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Reviewed in the United States on June 2, 2026
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C. Himes
Pawtucket, US
★★★★★ 5
THE book for America 250 - Beautifully Written
Format: Hardcover
Every American should read this book. Metaxas has written THE book for America 250. Whether you’re a history buff or someone who dozed through high school history class, this book will make you see the American Revolution with completely fresh eyes.
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Reviewed in the United States on June 2, 2026
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Kate
Grantham, US
★★★★★ 5
The American Revolution in ONE Volume
Format: Hardcover
The single best telling of the epic story of the REVOLUTION that’s out there. Extremely readable and informative.
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Sara Slimp
Waukegan, US
★★★★★ 5
Is America the Greatest Nation in the History of the World? Yes. And let Metaxas remind you.
Format: Hardcover, Format: Hardcover
EXCELLENT! Just the book I wanted to prepare for the 250th. Less textbook, more like a long chat with a friend. A great refresher on the important events of the birth of our nation and deep appreciation for some the men and women who don’t always get attention. It is so incredible how many events had to come together for our nation to come together as the GREATEST Nation in the History of the World!
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Reviewed in the United States on June 2, 2026

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