Arcadia Launches New LED Luminaires

Due for shipping in early August, Arcadia has recently issued spec sheets for a new high intensity, controllable LED luminaire.

Designated the OTL-LED, these new luminaries claim to be brighter than a 150watt halide at 500mm water depth and use a combination of 1w and 10w LEDs. The new luminaries come in marine and freshwater versions, and each in 60cm, 80cm, 90cm, 100cm, 120cm, 150 and 180cm lengths. Lightweight and slimline they are just 16.2cm wide and 2.5cm high. With lenses that are removable and cleanable, the freshwater model comes with a combination RGB, 8000K and 10,000K diodes while the marine version is fitted with a combination of Blue, RGB and 14,000K diodes. Energy consumption ranges from 73-231 watts depending on the model, and they also come with adjustable legs, timer/controller offering four timed channels and sunrise/sunset, a unique temperature sensor and display, and a ceiling suspension kit. RRPs range from £299.99- £699.99 depending on the model. Click on the sheets above to see larger versions!

Review: Hydor Performer Hi-Tech Skimmer 800 Series 2

Having already looked at a couple of cone skimmers in our recent reviews, we thought it would be interesting try something a little different and to investigate some alternative designs. Specifically, we were keen to test out a recirculating skimmer design in our system amid rumours of enhanced performance.

Before we look at the skimmer in question, if you aren’t really sure what the difference in these designs is, let’s start with a brief explanation. Continue reading Review: Hydor Performer Hi-Tech Skimmer 800 Series 2

Red Sea Launches Complete Supplement Pack

Red Sea has just announced the launch of a new addition to its highly successful and unique Reef Care Program.

The new Reef Foundation Complete Supplement Pack provides all the foundation elements required to achieve a balanced coral reef aquarium, and is ideally suited for use with accurate reef test kits such as Red Sea’s own Reef Foundation Test Kit. Continue reading Red Sea Launches Complete Supplement Pack

New Species: Purple Shingle/Helmet Urchin

Colobocentrotus atratusA new species image and profile has been added to the Digital-Reefs galleries!

Fairly common in the Southern and Central Pacific where they living intertidally in heavily wave-swept environments Colobocentrus atratus are notable for their both their stunning colouration and smooth, flattened ‘armour plating’.

To view the Urchins & Dollars subgallery click here (note: you must be a logged-in subscriber to access this page – if you wish to subscribe quickly and freely, click here).

Specimen photographed at fishmansfrags UK

Bacteria Found Hiding Deep Inside Corals

Credit: Photo by Michael Berumen, Woods Hole Oceanographic InstitutionAccording to researchers at Woods Hole Oceanographic Institution (WHOI) and King Abdullah University of Science and Technology (KAUST), corals may let certain bacteria literally get ‘under their skin’.

The study, soon to be published in the journal Applied and Environmental Microbiology, offers the first direct evidence that Stylophora pistillata, a species of reef-building coral found throughout the Indian and west Pacific Oceans, harbors a group of bacteria called Endozoicomonas deep within its tissues.

Continue reading Bacteria Found Hiding Deep Inside Corals

An Elegant New Pump Design For Aquaria Of The Future?

Photo : Fraunhofer IPAWhile Octopii generally move along the ocean floor with their eight arms, they have the amazing ability to propel themselves head-first by drawing water into their mantle, then rapidly expel it through a directional funnel by contracting powerful sphincter muscles.

Drawing inspiration from this natural design, German researchers at the Fraunhofer Institute for Manufacturing Engineering and Automation IPA, Stuttgart are reported to have developed an interesting new underwater propulsion system. Andreas Fischer, an engineer at IPA explains “We have integrated this propulsion principle into our underwater actuators: four elastomer balls with mechanical inner workings create propulsion by pumping water.”

Specifically, water is sucked into each actuator or elastomer ball through an opening. A motor driven hydraulic piston then contracts the integrated cable structure like a muscle. In this way, it pushes the water out of the 20 x 6 cm ball. “Our underwater actuator is well-suited for maneuvering small boats. It can also be used as a floating aid for water sport devices such as jet skis, surf boards, or scooters that pull divers into deep water. In contrast to ship propellers, it is quiet, and fish cannot get caught in it,” the researcher said. Said to be silent running and able to be 3D printed at various different scales, the design has just successfully past initial laboratory tests.

So could this design one day be providing a rather elegant solution for generating water turbulence in reef aquaria? Well, details on flow rates, energy consumption and noise levels seem scarce at present but we are actively seeking more information. Rest assured that as soon as we know, you will too!

Cephalopod Conquers Englands Highest Peak?

Being the tallest mountain in England, you might expect the summit of Scafell Pike to offer fabulous views and a experience a real sense of achievement if you reach the top. The last thing you’d expect to come across is the body of an octopus… but that’s exactly what a team doing a voluntary litter pick came across recently!

“My first reaction was that someone might have carried it up there” said mountain walk leader Dave Ascough, “but it’s quite possible a bird could have brought it up”.

Via BBC News