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-   -   Why not more metal halide? (http://www.plantedtank.net/forums/showthread.php?t=193769)

SCUBA_BUZZ 10-13-2012 04:22 AM

Why not more metal halide?
 
Just curious as to why more people don't use these. I use a 175watt over my 80 gallon and it makes the tank look amazing, natural looking shimmer along the substrate, plants are growing like weeds, and it's super easy to move out of the way when I want to aquascape.

Is there something better I'm missing out on?

CatB 10-13-2012 04:36 AM

i think most people don't have a tank large enough. if you put a MH over say, a 20 gallon tank, the plants will only suffer unless you hang it waaaayyyy up. i've seen plenty of others with 80+ gallon tanks using them, though.

willknowitall 10-13-2012 04:51 AM

yup not good for small tanks
you need at least 18 inch from front to back. 24 inch or wider is ideal or your just thoughing to much light on the glass

also if you live in a hot climate they give off too much heat

oldpunk78 10-13-2012 11:29 AM

I'm in a hot climate with a 16g tank and a mh fixture. The light is way above the tank though. I love the look. Nothing bends light waves like an hqi fixture.

DogFish 10-13-2012 12:38 PM

For me it's the energy $$$, bulb replacement $$$ and the heat.

I'm able to get the growth I need with 2- 18w PAR38 LEDs at a lower cost with a 50,000 hr life expectancy.

SCUBA_BUZZ 10-13-2012 05:09 PM

Ok that makes sense, I'm switching back from reef and am accustomed to doing a quick browse around find someone with same light as me see what they got see what I like and go get it. Since I can't find any tanks with halide I'm not too sure what I can get, what might suffer from too much light etc.

willknowitall 10-13-2012 11:53 PM

Quote:

Originally Posted by SCUBA_BUZZ (Post 2042115)
Ok that makes sense, I'm switching back from reef and am accustomed to doing a quick browse around find someone with same light as me see what they got see what I like and go get it. Since I can't find any tanks with halide I'm not too sure what I can get, what might suffer from too much light etc.

depends on how high your fxture is , what kind of fixture(reflector), are you adding lots of co2, what type of bulb, type of plants, effort you want to put into prunning

i have 3 150w halide lights, all are about 36 inch above supstrate, wide tanks, wide reflection, high co2, 8000k bulbs, ei dosing
plant growth is fast, algae not much of an issue

james1542 10-14-2012 04:12 AM

I love my 16.5" sunpod. It's a 70 watt hqi, mounted on legs right over the tank, and it doesn't heat my tank up over 73 F. My tank is only 14 gallons. I've melted a few plants when I first switched too it, but now everything thrives.

and the bulbs are under 30 bucks, probably get a new one every 2 years. For the wattage, it's hard to beat those lumens :)


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