Join Date: Feb 2012
Location: Ontario, Canada
Hornwort does that sometimes when not enough lighting or introduced to new water.
If your CRS are grazing around most of the time, don't worry that they don't eat anything you put in. Increase the feeding interval to like every 3 days and see if they feed better. They could be getting enough food from the biofilm. It will take weeks of absolutely no food to starve them to death.