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9     Editor’s Page by Marc Levenson
10     Reef Notebook
        • Surge marine life debuts with a new hybrid tang
by Kevin Barden
        • First sexual propagation success of Acanthophyllia deshayesiana!

A collaborative effort by Amanda Meckley
16     Reef Visions
edited by Matt Pedersen

22     Essential Filtration by Dr. Dieter Brockmann
28     Holistic Biological Filtration: Considering the entire aquarium nitrogen cycle
by Dr. Dieter Brockmann
36     Mechanical Filtration: Why and how?
by Daniel Knop
46     Take Five: On Filtration — CORAL Magazine speaks with five key figures in the world of marine aquarium filtration design
by Matt Pedersen and Marc Levenson
60     Hot Rod Filtration
by Mandy and Jeb Brackin
66     Pulau Pef Island: A diver’s dream
by Werner Fiedler
76     Interview: a visit with Jack Elliot
by Dr. Dieter Brockmann

86     Species Spotlight: St. Thomas Mushroom— The original and overlooked “bounce” ’shroom by Felicia McCaulley
94     Advanced Aquatics: Algae Scrubbers: Algae vs. Algae, Part III
by Kenneth Wingerter
104     CORAL Calendar
106     CORAL Sources: Outstanding aquarium shops
108     Coralexicon: This issue’s scientific & technical terms
110     Reef Marketplace: The marine products showcase
112     Advertiser Index
114     Reef Life:
by Alex Rose

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