View Full Version : Too much light?

07/22/2009, 05:40 PM
I am having a heat issue as well as colors being poor with my 150 Gallon starphire cube.. The dimensions are 36x36x31 I believe. I am running 2 x 400W Halide Radiums on icecap ballast as well as 2 x 54W actinics.. I am thinking of running one halide with the new style reflector that is 24x24 I believe. Any thoughts? This is a SPS tank.

07/22/2009, 07:07 PM
Thoughts anyone?

07/22/2009, 07:08 PM
oh no, perfect! I would go with two smaller reflectors so the light is evenley spread out.

teo reef
07/23/2009, 07:02 AM
How far from the water surface are the lams?
What kind of bulps do you use?

07/23/2009, 07:16 AM
Those Radiums should be helping you get excellent colors... Do you have a run down of parameters? I'm thinking something other than the bulbs is causing the color issues (unless the bulbs are old). W/ the heat... I'm trying to remember, do you have a basement sump or central air at all? I run two 400w halides in Lumenarc reflectors and two 5' VHO bulbs over my 125g and the temp runs from 80 at night to 83 during the day. Any higher than that and I turn on the air but I don't panic with these numbers.

If you really want to cut it down to one halide I don't see any issue with that as there are plenty of reflectors that should fill a 36" span. :)

07/23/2009, 07:43 AM
bulbs are 6 inches from the water level.. I am running radiums 20K's. calcium is around 440, salinity 1.025 alk around 8dkh, ph 8.3 but my temps have swung around from 78 to 84 degrees.

07/23/2009, 07:47 AM
Do you know your nitrate level?

07/23/2009, 11:04 AM
I had 400W XM 20K + 2x55W Actinics on a 40g hex... growth was awesome but colors were not as good as they looked under the prior Hamilton 250W 14K bulb. I feel that was borderline too much light.

If it's an open top tank, a nice wall-mounted fan blowing over the surface will keep it cooler. My 180g whent from 83F to 78F just with the addition of a fan... could probably go lower if the heaters weren't kicking in at 78F.

I tend to keep a little higher alkalinity and calcium levels... but my PH is usually lower than yours, most likely due to the CA reactor...


kev apsley
07/23/2009, 11:24 AM
I'd try raising those lights a bit higher and watch your colors pop and temps stabilize

07/23/2009, 08:05 PM
^+1 to kevs advice, or you could try 250 watters if you wanted to not raise the lights.

07/23/2009, 08:20 PM
The hood that I have is custom and I would have to cut it appart to raise them so I really don't want to do that. I am just concerned of bleaching with the 400's.

07/23/2009, 08:23 PM
Cut halides down to 5 hours and record your results.

kev apsley
07/24/2009, 07:15 AM
yup, you could always switch out to 250w bulbs or cut back on your photoperiod as mentioned in the two above post, both great idea's