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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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4.1 ★★★★★
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Product Reviews
★★★★★ 5
Good!
Format: Paperback
In great condition, shipping took a few days though.
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Reviewed in the United States on February 9, 2023
★★★★★ 3
Disappointed
Format: Paperback
Two chapters in the book are upside down.
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Reviewed in the United States on January 12, 2022
★★★★★ 1
Awful textbook
Format: Paperback
I think this is the most poorly written textbook I have ever used. The JBL site for this book is garbage. So many spelling mistakes and publishing errors. Rent this book do not buy, your program will most likely not keep this crap around for long.
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Reviewed in the United States on December 20, 2021
★★★★★ 1
Beware there are no page numbers.
Format: Kindle, Format: Kindle
it is not mentioned anywhere for E-textbook kindle version. Only displays location. If you need this for a class it will be impossible to know what exactly needs to be read.
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Reviewed in the United States on June 11, 2023
★★★★★ 5
An Informative Introduction Based on Current Academic Studies of Western Esotericism
Format: Hardcover
This introductory text is the fruit of a fairly new field of recognized academic studies which developed as a result of the pioneering literary efforts of scholars such as D. P. Walker (1914 - 1985) and Frances A. Yates (1899 - 1981) who took the subject of Western esotericism seriously rather than denigrate it as an area filled with superstition and irrationalism as many earlier scholars in different specialized fields had done. Other scholars of esotericism who have contributed to this growing field include but are not limited to Henry Corbin, Francois Secret, Antoine Faivre, Arthur Versluis, Joscelyn Godwin, and Wouter Hanegraaff, the last being the senior editor of the landmark Dictionary of Gnosis and Western Esotericism (2005), a collaborative effort by many scholars. Goodrick-Clarke is also a recognized scholar in this field and introduces it to the reader in his own introduction which also addresses the question of how esotericism is defined by those dedicated to studying it.
As clarified in the introduction, Western esotericism is rooted in the Hellenistic philosophy of classical paganism as expressed in Alexandrian Hermeticism, Neoplatonism, and Gnosticism which have syncretized with the three Abrahamic religions of Judaism, Christianity and Islam, leaving vital traces within each. Through the Italian Renaissance, a Hermetic revival occurred as a result of the rediscovery of ancient texts which further resulted in the development of magic, astrology, alchemy, and Cabala through prominent individuals such as Marcilio Ficino, Pico della Mirandola, Johannes Reuchlin, Johann Trithemius, Henry Cornelius Agrippa, John Dee, and Paracelsus, each given significant attention. The development of German Naturphilosophie, Christian theosophy through Jacob Boehme and his followers (such as Gichtel, Pordage and Law), and Pietism are also covered before thoroughly introducing us to Rosicrucianism in the early 17th century, high-grade Freemasonry and Illuminism in the 18th century, and the ideas and practices of Emanuel Swedenborg and Franz Anton Mesmer which significantly impacted esotericism.
Within the context of Rosicrucianism, the content of the manifestos are discussed along with Johann Valentin Andreae and the Tubingen Circle; in England, Michael Maier, Robert Fludd, and Comenius and the Origins of the Royal Society are covered. The impact of Rosicrucianism and theosophy on Freemasonry are explored as well as the following types of Freemasonry: "Scottish" and Chivalric, German Templar, and Egyptian. Within the context of Freemasonry and Illuminism, the following are also discussed: Martines de Pasqually and the Elect Coens, Louis Claude de Saint-Martin, Martinesism, Martinism, Willermozism, The Illumines of Avignon, and Count Cagliostro.
Not only are the ideas of Swedenborg and Mesmer presented but also how they contributed to spiritualism and healing movements in the 19th century, including the United States which birthed Andrew Jackson Davis as the main theologian for spiritualism; Phineas Parkhurst Quimby, Warren Felt Evans and others who developed the New Thought Movement; and Mary Baker Eddy who founded Christian Science. A separate chapter is dedicated to ritual magic from 1850 to the present. Within this chapter, one is introduced to Eliphas Levi and the French Occult Revival, the Hermetic Order of the Golden Dawn and its members, and special attention is given to the contributions of A. E. Waite, Aleister Crowley and Thelemic magick, and Dion Fortune and the Inner Light. I was, however, disappointed to see the section on Crowley end with the following: "Gerald Gardner (1884 - 1964), the founder of modern witchcraft, introduced Crowleyan magick into the neopagan Wiccan movement." For a better understanding of the influential role of Crowley and ritual magic, including the grimoires, on Wiccan practices, I recommend Wicca: Magickal Beginnings (2008) by Sorita d'Este and David Rankine.
Helena Blavatsky and her Theosophical Society are given a separate chapter which expounds on her influences, travels, developing doctrines, and legacy. The last chapter titled "Modern Esotericism and New Paradigms" discusses theosophical heirs such as Annie Besant, Charles W. Leadbeater, and Rudolph Steiner (who developed his own religious system called "Anthroposophy"). It also has a section on Fourth Way Groups, introducing Gurdjieff and Ouspensky. Additionally, it covers the scientization of esotericism, New Age science, and Carl Jung's influence on esotericism. One individual I would have liked to see introduced within the context of Steiner is Valentin Tomberg who anonymously wrote Meditations on the Tarot: A Journey into Christian Hermeticism which is recognized by some, including esoteric scholar Antoine Faivre, as a masterpiece of 20th century esoteric/mystical literature.
Goodrick-Clarke's book not only includes valuable footnotes and recommendations for further reading for each chapter, but also includes a helpful index as well as over 30 illustrations comprised of portraits, diagrams, plates, charts and other relevant pictures to supplement the text. This historical introduction to Western esotericism deserves wide readership.
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Reviewed in the United States on February 26, 2009