Maintaining proper mineral levels is a critical part of maintaining a successful reef tank. In high demand systems where a multitude of calcifying organisms constantly reduce Alkalinity, Calcium, Magnesium and certain trace element levels, water changes alone are unlikely to keep up with their needs. To stop minerals falling to dangerously low levels (which may detrimentally affect the health of livestock) there are a number of strategies that can be employed. The installation of a Calcium reactor is one of these methods, and widely regarded to be one of the best ways of providing balanced mineral supplementation over the long term. Continue reading Review: Hydor Performer 600 Calcium Reactor
With its vivid blue and gold colors, the nudibranch Felimare californiensis (also known as the California Chromodorid), has been a favorite species of sea slug for US marine scientists and students since its discovery in 1901. Unfortunately, water pollution from the heavily populated southern California mainland, historical over-collection and habitat loss has meant that it has been absent from local waters for almost 40 years.
However the deep blue slug with the bright gold spots reappeared in 2003 off Santa Catalina Island, and in 2011 the rare and highly sought animal was again spotted off Santa Cruz Island and off the coast of San Diego.
Although encouraged, Jeff Goddard (Project Scientist with UCSB’s Marine Science Institute and coauthor of a paper which was published in Marine Biology recently), remained cautious about the discovery. “Since the passage of the Clean Water Act in 1972, big strides have been made in reducing pollutants in the Southern California Bight, especially from large wastewater outfalls, and these improvements may have allowed Felimare californiensis to regain a foothold in the region,” said Goddard.