MH on a 90

[pfitz44]

MH lights on a 90 gallon... 250 or 175/150??

 

[whitey_028]

2 250s and some atinics and moonlights would let you do everything.

 

[laddy]

I vote 2 250's with some power compacts actinics.

 

[ninjamini]

I am setting up a 90 this week and I opted for 2x150 + 2x 96 actinic. I was fearful of heat issues. I do not want to think about a chiller.

 

[bonebrake]

If you keep the room relatively cool (68-72) and have good ventilation and place the lights high enough 8" or better above the water you can get away with two 250 watt metal halides and not need a chiller. If any of the above conditions are not possible then go for lower wattage.
:joy:

 

[whitey_028]

Originally Posted by Bonebrake
If you keep the room relatively cool (68-72) and have good ventilation and place the lights high enough 8" or better above the water you can get away with two 250 watt metal halides and not need a chiller. If any of the above conditions are not possible then go for lower wattage.
:joy:

 

[ninjamini]

Originally Posted by Bonebrake
If you keep the room relatively cool (68-72)
Burr. The fish will be cool but I will need to bundle up.

 

[pfitz44]

Originally Posted by Bonebrake
If you keep the room relatively cool (68-72) and have good ventilation and place the lights high enough 8" or better above the water you can get away with two 250 watt metal halides and not need a chiller. If any of the above conditions are not possible then go for lower wattage.
:joy:

ok cool thats kinda what i was thinking... i was lookin to mount about 10 inches... and put some fans to take care of heat with air vents on the back...
is 10" to high???

 

[laddy]

The wattage on your bulbs adding to heat issues is a minor concern if you have enough ventilation on your hood. Most people who blame their MH contribiting to heat issues don't have enough air circulating under the hood.......their secondary issue is the temp of the tank, their main issue is the lights burning their hood and setting their house on fire.

 

[pfitz44]

WEll just ordered my lights... 2x 250W MH with 2 96W PC atincs

 

[ninjamini]

Originally Posted by PFitz44
WEll just ordered my lights... 2x 250W MH with 2 96W PC atincs
which light?

 

[pfitz44]

Its a retro job.. ill post pics of the canopy when im donw with it this weekend

 

[bonebrake]

Hopefully this is redundant, but make sure you have a heater set at 78 in your sump that is sufficient to heat your volume of water when the metal halides are not on.
:joy:

 

[whitey_028]

Did you get moonlights with it?

 

[larrynews]

i have 2 400w mh on my 90 about 10 inches off water with 2 5inch fans built in the hood..

 

[pfitz44]

Originally Posted by Bonebrake
Hopefully this is redundant, but make sure you have a heater set at 78 in your sump that is sufficient to heat your volume of water when the metal halides are not on.
:joy:
o yea... well right now ive got about 3 heaters in the tank itself.. sump is going to get turned on today.. then they will get moved down to teh sump