The Planted Tank Forum banner

180 Gallon, How many watts?

2114 Views 8 Replies 6 Participants Last post by  mhossom
We have a 180 Gallon tank currently with 4x96 CFL tubes over it.. we are going to have medium to high light requirement plants, should we add more and if so how much.. this puts us just over 2.1 WPG as we stand. we could add another two fixtures doubling the light but would 4.2WPG be too much?

Thanks!
1 - 9 of 9 Posts
It depends on the footprint of the tank. Is it a 4 ft long 180 gal or a 7ft long 180 gal tank for example. The way the light bulbs are arranged will matter as well. Some parts of the tank may be ok for high light but other parts may only be good for low light plants.
Sorry that would have been a good up front fact.. its 72"x24"x24".. There are two 36" dual tube fixtures over it now.. so its even light all down the center of the tank.

However we did get today a third 36" dual bulb fixture to see how it looked adding it.. Two fixtures in the back and one in the middle of the front. Might move it to one end where its planted more heavy.
If you really want a med to high light tank, you're gonna have to go to T5 HO or better. You're main issue is tank height. I have a 120g that's 4x2x2, and CF lighting (even 390wt) wasn't cutting it. I moved to Hagen's Glo setup, 2 of the 2x54wt T5HO, and it's made a world of difference. Less wattage, brighter bulbs, less heat issue.

You can try adding more wattage, but the issue I ran into was that CF lighting didn't penetrate in the water column deep enough.
You'll need watts and watts of watts. HAH. I'm hilarious.
I'd go MH's, HQI's with electronic ballast.

If you decide to go whole hog, do it right and give yourself the flex and color effects you want.

You can run a sexy series AM light, with a pendent design, 3x150w and 2x70 W, that's what I chose.

Other folks might wnat the 3x150w and 4x 39W T5's, I suppose you could find some places that make 4x 94 and 3x150, or add the 3x150 to the existing hood if possible using retro fit kits and the wood canopy if you have that type of set up.

I've used high light for a long time(and low light).
So I am use to it.

Generally, if causes lots of troubles for folks. And there is really no plant you cannot keep with the light you now have, it just grows slower...........but if speed is what you want, then that's your goal:)

Regards,
Tom Barr
See less See more
Another thing to consider will be the time you are willing to spend of the tank(I assume electricity bill is not an issue).

If you use a high light setup and fill a 72x24inch tank with stem plants(I am guessing you can probably fit close to a thousand stem plants in there assuming minimal hardscape), you will need to prune all these plants probably at least once a week.
Thanks all for the input, I think we will hold off going to MH for right now. we will see how long our array of 96w PC lights work for us.. it is a new setup and we have 3 fixtures already, when we get heavy growth mabye we will re-evaluate. I don't think we are looking for speed growing, but rather just healthy..
If you really want a med to high light tank, you're gonna have to go to T5 HO or better. You're main issue is tank height. I have a 120g that's 4x2x2, and CF lighting (even 390wt) wasn't cutting it. I moved to Hagen's Glo setup, 2 of the 2x54wt T5HO, and it's made a world of difference. Less wattage, brighter bulbs, less heat issue.

You can try adding more wattage, but the issue I ran into was that CF lighting didn't penetrate in the water column deep enough.
You are getting good results with just 4x54 T5HO over a 120? If so, does this include ground cover, like glosso?
1 - 9 of 9 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top