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Old 01-14-2008, 02:12 PM   #1
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In general do corals change color as the grow? If i buy a coral thats colors arn't very bright from the store will they become brighter as the coral grows or becomes more healthy in the tank?

also i saw ziggy953 post this as a reply in another thread and wanted to ask a question without jacking that persons thread.

"Well the short and long of it is this. Start setting some cash aside to either buy a new fixture or a diy kit of some kind. Even though you have your clam up high in the tank I don't think you are giving it enough light. I know that doesn't help you much. I have the same tank you do. I have dual 175w MH (10Ks) 220w of VHO Actinics and 108w of T5 blue actinics. (678watts total). I didn't have that to start off. I slowly added to my lighting. I actually started with a PC fixture 260w I think. Eventually I got the MH ballast and bulbs, then added the VHOs and just recently added the T5s. With your tank like mine they are deep and you are going to need some decent lighting to penetrate to the bottom. As Fiji said the bulb has to match the ballast. Trying to fire a bulb that doesn't match the ballast can damage both the bulb and ballast. If you would like to see some pics of my set up let me know. I have pics of the canopy I built to house the lights."

What is the difference between the VHO actinics and the T5 blue actinics? Are they the same kind of light just comming from different kinds of bulbs?


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Old 01-14-2008, 02:36 PM   #2
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VHOs = Very High Output. The bulb is large similar in size to what you would see in an office building light. Mine are 110w each. These are my main source for actinic supplement on my tank. I added the T5 HO = High Output (very small bulb in comparison to the VHOs and are 54w each the blue actinic is a lot more blue and brighter then the VHOs) to add adittional blue to the tank. I use 10K MH bulbs on my tank and they have little to no blue in them. They are designed for growth and intensity. I add the blue to bring the color out in the corals. This was a personal choice for my tank I wanted to brighten up the tank and bring out the color in my corals.

Now to answer your question about corals changing color. A coral will change its color based on the lighting you have on your tank. For example; I have an acro that looked almost tan when I got it. It had a single purple tip. Since I have switched to the 10K bulbs and the coral has received the lighting it needs to grow the purple has become more pornounced. Another member said his brain coral had changed color. The way a coral grows is directly related to the lighting on a tank. Better more intense light and corals will grow (provided you have high light corals), the show off of color comes from the actinic lighting.

I hope that makes sense.

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Old 01-14-2008, 03:19 PM   #3
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Don't miss the key to Ziggy's post... "provided you have high light corals". If you're new to the hobby, I can see where maybe this piece of info might be overlooked. More lights doesn't always mean better colors. Of the seven corals in my tank (and several that I purchased that are no longer with us), I've only had one coral NOT shift their colors a bit once it went into my tank.
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Old 01-14-2008, 05:10 PM   #4
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Alot of times when they come from the LFS they will be slightly bleached from the shipping and improper lighting and also improper feeding. If you take care of these and have stability in your tank you`ll see a difference.
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Old 01-14-2008, 05:17 PM   #5
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Thanks for all the help. Once i get my tank, hopefully tomorrow, and get it all set up I'm sure i will have more questions and stuff to post. This site has been a great help trying to learn the hobby.
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