Originally Posted by carberarr
Great. So the green algae thats grown in it will just die off most likely, and wont do anything bad?
That is right
as it ages then you would see new stuff show up.. If you are just now cycling this would be the time to add it because there will be stuff in it that will continue to decay
However I would not recommend bleaching ... boiling water will work fine . Just be sure no chemicals were sprayed around or near it ,and make sure they did not medicate it which could cause issues