Found a tiger barb dead in my tank a few days ago and now one of the others is looking very pale today and his tail is drooping, any ideas what this could be??
Water tested fine, zero ammonia and nitrite, ph 7 as it always has been, tank was set up about a month ago, fully cycled as I had mature media from another tank, no new fish added
I would do a massive water change, regardless of the stats. I had problems with my tigers, and a huge water change seemed to help a lot. I then did a smaller water change the day after. All fine now.