Quote:
Originally Posted by Son Of Skyline
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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What you're describing is a pretty normal response to corals living in a low nutrient environment, it doesn't necessarily mean they're stressed. Some would argue that the darkening/browning of corals is also a symptom of stress. In reality, I think both conditions are simply different possible states along coral's range of possible adaptations, and what we think is 'best' comes down to personal taste. What you view as 'normal' algae growth might be nuisance levels to someone else. Changing the condition that a coral is adapted to will cause it stress, but they're very good at adapting to a wide variety of nutrient conditions given time (within reason). Whether you like 'deeper' colours and are ok with some brown and noticeable algae growth, or whether you like the more pastel 'zeo' look or don't want any algae growth at all comes down ultimately to personal taste.
In any case, having biopellets does not ultimately mean that you have to have an ULNS, controlling the amount of pellets you put in your reactor, or getting a recirculating reactor can allow you some control over the way your corals look.