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va_blue_stang
01/22/2014, 06:58 PM
I'm getting ready to set up a 20G long and have a lighting question. I'm using a 250watt metal halide in a pendant fixture and was wondering what would be the idea height from the waters surface would be best? I am planning to keep a little of every type of coral down the road including clams.


Thanks for the help, Mitch

va_blue_stang
01/22/2014, 11:13 PM
Thanks for the answers

snulma1
01/23/2014, 09:06 AM
A 20 Long is fairly shallow, and a 250 MH will spike your temps. during the winter you may be ok, but come summer...

That being said, I would start at least 12", but realize the higher you get, the more light spillage you are going to get, meaning you will be lighting a lot more then just your tank.

d2mini
01/23/2014, 09:26 AM
You'll have to play around with it.
As a reference, I had a 24" deep tank with a single 250mh and four ATI Blue t5 bulbs and that fixture was about 10-12" above the water.

va_blue_stang
01/23/2014, 04:41 PM
Thanks for the answers
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Amatuer21
01/23/2014, 04:42 PM
Thanks for the answers

lol

hersheyb
01/23/2014, 04:55 PM
I would try something else from MH, they produce too much heat for a nano... Have you considered LEDs?

va_blue_stang
01/23/2014, 06:59 PM
I would try something else from MH, they produce too much heat for a nano... Have you considered LEDs?
Nope on LED's, already have the MH is why I'm using it. I've seen a lot of others with mh's on a nano.

Sugar Magnolia
01/24/2014, 07:41 AM
Yep, it can be done but the fixture will need to hang high as mentioned above. If heat becomes an issue you can always use a clip on fan to help dissipate the heat.