I am starting a 29 gallon reef tank and so far I have a skimmer, lights, and power heads. I am getting live rock soon but my LFS also told me that I also need to used carbon for chemical filtration. I have some HOBs from when I had a freshwater tank? Is it really necessary to use it?
Chemical filtration?
- Thread starter gtox44
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Others may disagree, but I only run carbon when trying to remove contaminants or meds. I run a HOB on my 20G that was previously used on a FW tank with no issues. I removed all the media including the carbon and filled the chamber with LR rubble. The pods seem to love it and it allows them to maintain a population even with my goby and wrasse chowing down constantly. 
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Its Live rock rubble, acts as a bio-filter, most of us use Live rock in the tank and sump to filter the water
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I run it 24/7 because I have leathers and sps in the same tank and was always worried about chemical warfare . I also run ozone and is a must with it's use. I know carbon removes some of the toxins. Is it absolutly necessary, problably not. If you do decide to run carbon make sure you keep it changed at recommended intervals.
