How long is your photoperiod?

[whatcaneyedo]

1. Tank Depth
2. Light type/wattage/height from water
3. Reflectors
4. What coral do you grow?
5. Do you run carbon or anything else to 'clear' the water?

1. 24"
2. DE MH/250W/6"
3. Lumenmax 3
4. LPS & SPS
5. 1 cup carbon changed monthly

[Denis]

1. 24"
2. 14k 250W HQI @ 7"
3. 3x PFO mini on 5' tank
4. SPS
5. Carbon in sock and Ozone

[marie]

I don't have any supplemental lighting and I don't like looking at a dark tank so the lights are on for 10hrs. I have good colour and great growth.
1. 29" deep tank
2. 250w 10k xm's with hqi ballasts approx 12" off surface
3. lumenmax elite reflectors
4.sps
5. carbon changed ever 6 weeks or so


If cutting back on the lighting period means increased growth maybe I'll keep the lights on for 15hrs instead

[loveless]

1. Tank Depth
30"

2. Light type/wattage/height from water
20K radium 400W, 15" from water

3. Reflectors
Spiders - def not the best

4. What coral do you grow?
SPS, nem, goniopora

5. Do you run carbon or anything else to 'clear' the water?
Negative

[Umpa]

I have mine on 12hrs a day, and I am having brown corals, I dont think its bright enough.

[Aquattro]

Originally Posted by Umpa

I have mine on 12hrs a day, and I am having brown corals, I dont think its bright enough.

When I ran my 400w MH 12 hours, I had brown coral too. Now at 6 hours, I have colored corals.

[Umpa]

Oh I might try that then, my understanding was that all zooxanthellae is brown, and when there is not enough light the coral makes more zooxanthellae and thus the coral goes brown. That said - if there is even less light then the zooxanthellae dies and the coral starts to bleach and die.

So now I'm not sure what to do - lol