My tank is a little over 4 years old and at about the 3 year mark I started dosing vinegar and tried pellets. My algae all disappeared, and my corals became pale. I had to clean my pumps and plumbing twice as often because of the bacterial slime buildup. I could tell that all the inhabitants of the tank were stressed to some level. I stopped after 6 months and now everything seems much happier. Better PE, more "normal" algae growth, coral colors deepened again (some more brown but much happier looking), no more slime clogging up my plumbing..etc. I won't do carbon dosing again. My tank never needed it.
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-Mason
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