Quote:
Originally Posted by LifeIsGreat
Once a DSB is established it should never be disturbed, or it will kill the tank. I have a DSB: I was a bit liberal with my siphoning one day and my corals shut up for a month and I got an outbreak of cyano. I really like my DSB and the benefits it creates for the tank, but they must be used with caution.
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Yes but they do have a shelf life and eventually, you start to get symptoms of old tank syndrome.