i have two colony of zoos that are not fully opening. this has started last week and i did a fw dip and now some are opening back up but some are still close and has been like a week already. i check for nudi and eggs but did not see any. the only thing that i notice on some of the zoos that are not opening is a brownish color thing at the root of the zoos. it look like fungus or some sort. sorry but no camera for pics.