So I get home from work yesterday and notice my blue powdered dwarf was acting strange. Breathing seemed a little labored and he wouldn`t eat. He was fine in the morning before I left and ate like normal. This morning when I woke up and checked he was dead. Wondering if anyone else has had a similar experience with there`s. He was in a 20 gallon with 5 corys who are all acting like normal. Water parameters are perfect as they have been for awhile. Temp is between 78 and 80. No trace of ammonia.