400w MH over 75g tank. Overkill???

[wickedfrags]

What are the dimensions of the tank? Is it a 4' long tank? What are you planning on using for a reflector - this can impact how effective the MH lighting will be.

[Chowder]

I have a hamilton 400w de and a 250w de over a 65 gallon. I have heat issues in the sense that a run a chiller all year round and go through about 8 gallons of water a week due to evaperation. I do have good colour and growth thou.

[dreef]

Here's my american buddy Phils tank,just a hair over 56 gallons,lit with a 400.He a zoa shroom ric guy and he blasts em with light and everything loves it.

http://reefcentral.com/forums/showth...5&pagenumber=1

[kadaytar]

I had 1x 400 Watt, 1x175 Watt MH's + 2x96 Watt URI VHO actinics over a 36"x18"x18" tank. I ran two fans one blowing inside the hood other one outside. I didn't have a chiller and didn't have any heat isues. If you use a Luminarc reflector probably one 400 Watter will be good for 24"-30" but if your tank is longer and wider you may need other bulbs.

[tang daddy]

I'm running 65g 400w mh with 36" canopy air hockeyfan rigged to cool the bulb it was fine until last week tank was sittin at 30+ had to get a chiller so I think it would be fine since you have all the equip and if you mount it a foot off the tank better light spread.

[blood_hound]

ok thanks guys.

[Murminator]

PFFFFT I got a 400W over a 29G ...it will be fine