Hi Greg, it is plumbed together.
This coral in particular though went into my ritteri tank which isn't plumbed into that system. But there's enough transfer back and forth (feeding, or moving a coral over from one tank to another) that if it was, say a pathogen such as a protozoa or a bacteria that it couldn't just hitchhike over and "infect" the other tank. (I hope I'm way off base on this theory though.)
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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