Tropical Fish Keeping - Aquarium fish care and resources

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fredo66 09-15-2010 05:55 PM

How long do i need lighting
Im upgrading to a new tank and new lights. I currently have compact flouresent and upgrading to T5's. My new tank will be 36"x18"x25". I have green mushrooms, flower pot, and feather duster, eventually i want to start with SPS. I How long do i need to run the T5's?

bearwithfish 09-15-2010 07:55 PM

this really depend on you and your corals i run mine about 12 to 14 on and 10-12 off.... others only run 6-12 on and the rest off .. i attempt to stay as close to 12 12 as i can

briang 09-19-2010 07:54 AM

I have t-5s and I have the lights on about 9 hours a day. I cut back from 12 hours on due to a hair algae problem and since the cutback, I haven't had a problem in 2 years!:-D

DisneyCoralReef 09-19-2010 09:23 AM

Thanks for starting the thread fredo. I had the same question. SPS is also what I've been thinking of doing and had no idea as to how long to leave them on for.

So the schedule is either 9-12 hours on, now my question is, how many bulbs are you guys using for T5's, because im sure the number of bulbs also change how long you leave them on for.


fredo66 09-19-2010 11:25 AM

I was told that 4 bulbs would be sufficient for a few SPS, but if you want to have a lot of them through out your tank you want to go 6 bulbs. Agian, Thas what i heard.

badxgillen 09-19-2010 02:18 PM

yeah i am with bear 12-12 if you can ...but others do differnt and are very succesfull...on my frag tanks and my reef tank i leave the 420nm actinics on 24-7..but i am not recomendingg it i am just saying this subject can be variable...such as the place of my employment has theres on 12 hours a day as well and they seem to do fine.....ADIOS....

bearwithfish 09-19-2010 08:03 PM

i run 4 bulbs on mine 2x 12000k ans 2x true actinics and so far no real issues ( again just upgraded so time will tell)

briang 09-20-2010 10:21 PM

The amount of bulbs depends on the size of the tank. I have six bulbs, 3 -54 watt, 12,0000 ks or 10,000 depending on what's in stock and 3-54 wattt actinics. I prefer 12'000 ks. I have this on my 75 gal. tank and it fits nicely. When I had my 55 gal. tank, I could only fit 4 bulbs, 2 - 12'000 ks and 2- actinics

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