how often am i supposed to be running carbon on my tanks?

Just need to now how often i am supposed to be running carbon on my tanks. I have a 120 gal and a 30 gal. What does carbon do for the tank?
 
Take a look at this article. I found it helpful.

http://www.pets-warehouse.com/carbon.htm
 
That is a good article. I never used carbon in my tank, but if you want to there is nothing wrong with it. For the size tanks you have I would recommend a couple of cups of carbon run for a just a few days a month (3 or 4). That should be plenty for what you want to do.

BigScott
 
It depends what your trying to accomplish also. If it's just to take the yellowing out then a few days a month is plenty. If you have a mixed reef and want to reduce the alleopathic substances between corals then you can run 24/7.

Honestly over the years I've done both. I ran a 135 for 3 years and never used carbon with no ill effects. I had a 55 at one point and used it a couple days a month.

The last couple years I've run carbon 24/7 changing at a minimum every 2 weeks as most of the guys I really respect do so I try to copy where I can.

Honestly I think it helps but it really depends what your doing it for.
 
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