Sick Danio or just "pooped"

Aug 22, 2008
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#1
Hi Everyone,
I'm new here and new to freshwater fishkeeping. My 5 gallon tank is in it's last stages of cycling with 5 zebra and 2 long finned danios. One of my long finned has been displaying a long stringy "poop" (sorry) late in the evenings. It lets go at some point but is this normal for this fish or should I be worried?
Thanks for any advice.