Did you add anything to the tank (chemicals)?

--
Craig Brye
University of Phoenix Online

"John Owens" wrote in message
...
I have 3 tanks that had fair sized colonies of hornwort. Last week,
almost
like on command all three colonies just broke up into tiny pieces, as of
the
plant just disintegrated. Up until that point they were doing fine for
months. In fact 2 of the three colonies were gotten from divisions of
the
first one. Is this a common thing?