Tag Archives: Mounting

Experiment Update 1

Here is the latest on the LED marine coral experiment.

We will keep a photographic record of the light comparisons, but it is unlikely that they will show growth differences in only a month (maybe 2).  The corals will have changed color in that time period (even when photographed with flash)  This reversible color change occurs within a month, and we are using it as evidence that the corals have adapted to their lighting.  Additional anecdotal evidence is accumulation as well. About 25% (6 colonies) of Galaxia under LED for 4 weeks now have entered an aggressive growth phase.  This is indicated by the production of large sweeper tentacles that digest neighboring coral.  None of the Galaxia (400 colonies) under VHO or Halide are showing sweepers.  All of the corals are in the same water, at the same temperature and flow rate.  Only the light is different.

With respect to the photos, I am finding the color balance dramatically shifted toward violet.  This produces an image that does not resemble the subjective evaluations my eyes provide.  Have you obtained representative photos.  Remember that our entire 2000 gal system is a collection of raceways; The water is less than 6 in deep and there is no viewing glass.
Included are a few urchin spawning shots  and a Platythoa. Aquarium LED experiment, study, best aquarium LED
Aquarium LED experiment, study, best aquarium LED
Aquarium LED experiment, study, best aquarium LED

And, so it Begins. How to Mount?

Part of the challenge before experiments can even be ran is figuring out how to use all of the equipment to suit what needs to be done. The design of where all the corals are being watch is like a “raceway”. Not normal tank standards. These raceways a long and short. Figuring out how to mount any lighting over style of tank would be a challenge.

Here’s what the guys at St. Mary College of Maryland figured out.

AquaRay LED Mounting

TMC AquaRay DIY Mounting

AquaRay LED Mounting

TMC AquaRay DIY Mounting

The lamps are mounted on a PVC plate that is attached to J hooks.  The J hooks are suspended from a pvc frame that is held by I beams above the tank.  The lamps can be slid along the I beam or back and forth across the pvc frame or up and down by repositioning the j hooks.

There are 8 units installed over the cloning facility and display tank as well as 8 units installed over the main research tank – 8 more tomorrow.  Eight more over the holding tank next week.

The display and cloning tank have been operational for several weeks now.  Eight  LEDs are replacing 8 175W 10,000 K Halides (two year old bulbs).  The halides were delivering a Par of 39 and the LED’s 62 uM photons/M^2/sec.  Anecdotally, all to the animals look better as fluorescence was dramatically enhanced by the increase in hight frequency light.  Polyp extension appeared increased and color was more vibrant.  Only one species (Sinularia) objected to the switch and required two weeks to acclimate to the lights.