Metal Halides

Neil H

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Mod note: Posts moved from http://www.marineaquariumsa.com/showthread.php?t=1994

I have a new tank, 120 x 60 x 75 lwh,
would this lighting unit work for me? i want to have a full feef tank and was going to go for 6 or 8 t5's as the mh price was a it steep for my budget
if i put this in tank a lid and not suspended as shown in thi pic, will i have heat issues???
 
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Rory

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Hey Neil

This unit is only 60cm long so you would require 2 of them to light a 1.2m. (general guideline is 1 150W MH per 60cm tank length)

As for the heat issues, yes MH's generate quite a bit of heat. Your "lid" would also have to be quite high as you need to position it at least 15cm above the water, plus a few more cm for the actual unit and some space above it for ventilation. You're looking at a lid at least 30cm high and with some sort of fans in it or just very well ventilated.

Basically if you want a nice "closed" look to the tank you will have to go with T5's. As for the budget on T5's I think MH's probably work out cheaper at the end of the day. 6 or 8 is more than enough if you go for the GOOD T5's (ATI/Deltec/etc). Unfortunately as with pretty much all reef stuff good=expensive.

I'd say 2 good T5's should be fine for softies, 4 for LPS, 6 for SPS/anemones. 8 would be rather expensive...
 

Neil H

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thanks for the feedback Rory,

as a ball park figure what am i looking at for MH?

This hobby is a very challenging one and i appreciate any advice given!
 

jacquesb

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Hi Neil - the cost of metal halides depend on what you want to get:
DIY metal halides are split up:
- starter/control gear: +-R550
- fitting: +- R185
- 150 watt double ended BLV 10000K globe (depending WHERE you buy - LampHouse price: +- R330)

Complete Metal halide unit WITH T5's in, +-R3500 (with one MH unit)
 

Neil H

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Thanks Jacques,

i am assuming for this diy option one would get the goodies from any building supply shop?

thanks for the input
 

Rory

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The prices jacques gave are pretty spot on for DIY.

As for 54W T5's around R300 ea for globes, R200 and something for a dual 54W ballast. If you get waterproof holders they're around R40ea (so would need 4 for 2 globes) but you can just use plain electrical connectors.
 

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