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World’s Largest Deep-sea Coral Reef Discovered off the Southeast United States

A deep-sea coral reef covering 6.4 million acres has been discovered off the southeast United States. Researchers working for NOAA and its partners mapped an underwater seascape of coldwater coral mounds the size of Vermont, deeming it the largest deep-sea…

Red Sea Max Nano G2 XL is their biggest Nano Reef Tank to date

Today Red Sea has released details on its latest aquarium launch, the Max Nano G2 XL. Like the Max Nano and Max Peninsula, the G2 XL is an All-in-One plug-and-play reef system, incorporating 50-watt app-controlled LED lighting, an ATO, a…

$3000 Moonstone Chromis arrives in the US from the Deep Waters of Japan

Rare fish retailer Unique Fins has informed Reef Builders that it has received two specimens of the super rare deep-water Moonstone Chromis from Japan. First described in 2019 by Yi-Kai Tea, Anthony Gill, and Hiroshi Senou, Chromis tingting was described…

How Seven Seas Aquatics Survived Hurricane Ian and Two Weeks Without Power

Seven Seas Aquatics is a beautifully laid-out reef store with five-star reviews, but back in September 2022, it was nearly wiped out by Category 4 Hurricane Ian, which killed 150 people and caused $112 billion in damage across the State…

California Issues Total Ban on Caulerpa: Warns Retailer of $10,000 Fine Per Violation

The California Department of Fish and Wildlife Agency has written to e-commerce company Etsy and notified them that the sale, possession, or transport of all species of marine macroalgae Caulerpa is now prohibited. In a letter written on Jan 2,…

Flashback Friday: Steve Weast’s Temperate Azoox tank 

Looking back through the archives, 2011 was quite the year for NPS enthusiasts as Managing Editor Jake Adams and contributor Joost De Vries covered over a dozen Azoox (azooxanthellate,) corals, as well as some stunning home aquariums that were dedicated…

Coral City Camera Records World’s Most Comprehensive Coral Bleaching Timelapse

Everyone’s favorite underwater camera now has the dubious honor of creating the world’s most comprehensive in-situ coral bleaching timelapse video. Underwater content creator Coral Morphologic says that the summer of 2023 will go down as the hottest in recorded history…

Reef Builders Top 10 Products of 2023

We took an entirely new approach to selecting our Top 10 products of 2023, this time listing each and every product we wrote about and published during the 12 months of last year, but letting our Facebook audience decide on…

What is Coral Polycropping?

In this new series, I will discuss strategies you can use with current technology to help mitigate the risk of coral disease in your reef tank. In this first installment, I will cover the benefits of polycropping. Polycropping vs Monocropping…

How to deal with Coral Aggression

After discussing coral selection, quarantining, placement, and nutrition there is still one other aspect of their keeping that needs to be considered, coral aggression. Since corals are sedentary and cannot move once they have settled into place or been mounted…