Stony coral nubbins (tentatively identified as Porites lobata; see Figure 1) were exposed to light of the same intensity (128 µmolm²sec) but different spectra for 75 days. Growth rates were determined by weighing the fragments periodically with an analytical balance.
Dana Riddle thoroughly reviews one of the most anticipated and innovative water circulation devices to enter our hobby in some time. How does the Maxspect Gyre XF150 measure up?
Dana Riddle thoroughly reviews the Barrier Reef Aquarium Nova A4 controllable LED light. For under $300 USD, how well does this four array, 51 LED, 100 watt, remote-controlled fixture perform?
The Apogee MQ-200 Quantum Meter offers many advantages to aquarium hobbyists. The meter is relatively inexpensive (as quantum meters go) and the submersible sensor is small and allows measurements to be made in tight spots. Hobbyists should take a careful look and see if this PAR meter is for them.
Equipment Review: LED Lighting Tests: Ecotech Radion Pro, Aqua Illumination Hydra, GHL Mitras 6100HV and 6200HV
LED lighting has come a long way and the new generation of LED fixtures is delivering on the promise of LED technology, and control features. As usual, the users need to consider their own applications to determine the best one for the situation. Hopefully this data will be helpful in making your decisions.
Continuing in the same vein as my previous LED lighting tests, this article presents data on light intensity and spread along with spectral plots for several new LED fixtures.
Dana provides a very in-dept look at the Tunze Nanostream pumps, their flow characteristics, and water velocities and compares them to various water velocity zones found on reefs.
"I want a reliable lighting device and Build My LED seems to have hit the right note." Dana evaluates the construction, performance, and customer service of a custom-configured LED light from the new company, Build My LED.
Aquarium Equipment: PAR Meters and LEDs - How Accurate are the Measurements? A Comparison of Three Meters and Lux to PAR Conversion Factors for LEDs
How do PAR meters stack up to one another? Dana delves into the data comparing and contrasting three light meters and gives us his take on the results.
It's been a little over a year since Ecotech Marine introduced the Radion LED light. The Radion made big waves with aquarists and quickly ascended to mass popularity. In January 2013, Ecotech Marine began shipments of their latest and most powerful incarnation of the Radion platform: the XR30w Pro. Advanced Aquarist takes a closer look at the Pro.
As LED lighting moves further into the mainstream, there is new effort being made to provide a fuller spectrum light that can be tuned by the aquarist to satisfy both the demands of the corals as well as the visual pleasure of the aquarist.
This review will report on operational issues of a MP60 that has seen over a year of service. How well did the pump hold up? What problems, if any, encountered? These questions and others will be answered below.
Marineland Aquarium Products' Maxi-Jet pumps have been around for quite some time. Recently, their design changed as well as their country of manufacture. The manufacturer promises relatively high performance while offering them at very modest prices. Is this a case of 'you get what you pay for' or are they a true value?
Aquarium Lighting: Moonlight - A Concise Review of Its Spectrum, Intensity, Photoperiod, and Relationship to Coral and Fish Spawning
Moonlight is thought to play an important role in timing reproductive cycles of many coral and fish species. In corals, lunar cycles set the date of spawning, while the time of onset of darkness fine tunes the cycle and decide the hour and minute (then a release of hormones into the water induces mass spawning). Lunar periodicity seems to play a role in timing of reproduction among at least some fish species. It seems apparent that different taxa are affected differently by altered moon phases, if only temporarily.
It is imperative that you use reflectors with T-5 bulbs, and individual reflectors do a better job of sending light into a tank than a single reflector. Bulb temperature and even an aquarium's background has a measurable effect on lighting performance.
RLSS is a new line of protein skimmers by H2O systems featuring the speed-controllable Waveline DC pumps. Advanced Aquarist reviews the RLSS R10-U.
In addition to the characterization of light by its intensity and distribution, the spectral distribution is also of interest. Light sources emit light at varying amounts at different wavelengths. Spectral distribution characterizes the light output across different wavelengths of the light spectrum.
As LED lighting moves further into the mainstream, there a lot of new choices available to the aquarist. Hopefully this data will help the aquarist make an informed choice on what to expect from the individual LED fixtures and how best to utilize them to achieve the desired coverage and light intensity.
What seemed impossible to many just a few years ago is now reality - this LED luminaire can complete with metal halides when used over coral reef aquaria of sizes commonly seen in homes. I've had another Blue Moon Aquatics LED system in operation for over a year and report no problems with it. If that is any indication, one should get long, reliable service from the P30 luminaire.
Product Review: Inexpensive Analytical Devices: Hanna Instruments' Checkers: Alkalinity and Phosphate
In many cases, results from colorimeters are superior to visually judging colored samples. Will an inexpensive device deliver results comparable to an expensive spectrophotometer? Dana tests the Hanna Checkers to find out.