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View Full Version : How Long To Run Halides Each Day!!

InADream
09/09/2007, 07:17 PM
How long should i run my halides for... I have heard 6 -12 hrs... I will be purchasing a chiller this week or next... If i can control the temp does it really matter how long they run...

Dream
JetCat USA
09/09/2007, 07:20 PM
I've ran them as little as 4 hrs and as much as 16 hrs and never found any problems with either or anything in between.
culinarydreamz
09/09/2007, 07:20 PM
IF u can control them temps, there really is no limit but the best is to re-create the actual sunlight. I've read many things that corals don't beneift from any light after 4hrs but they don't hurt either.
dadonoflaw
09/09/2007, 07:21 PM
i would say at least 5 hrs. i run mine for 5 hrs. but i would say if you have good actinic supplementation than 5 hrs is good. if its not so good then 8 or more hrs is good
KEstep
09/09/2007, 07:21 PM
I run my halides for from 12:30 to 11:30. Any longer and my corals get upset. This varies for every aquarium though, if you have algae problems then I would run them less.
culinarydreamz
09/09/2007, 07:33 PM
IF u can control them temps, there really is no limit but the best is to re-create the actual sunlight. I've read many things that corals don't beneift from any light after 4hrs but they don't hurt either.
InADream
09/09/2007, 07:56 PM
I was running my lights for 9 hrs with only a 2 degree temp change... Recently i painted the inside of the hood silver instead of white and saw a 3.5 degree temp change... I guess changing the paint color added 1.5 degrees... It looks like there is more light in the tank as well...

Dream
reef / aholic
09/09/2007, 09:45 PM
http://www.science.uts.edu.au/des/StaffPages/PeterRalph/photosynthesis.html