Hi Everyone, Last saturday, I upgraded an established 20 gallon tank to a new 55 gallon tank. I Have been testing everyday since the upgrade and it seems to be going well as my water para. still look very good: Ammonia 0, Nitrite 0, Nitrate between 5 and 10 so I'll say 7.5. Before leaving for work this morning, I noticed one of the panda corys flashing against the docorations. There were no visible signs of disease and he ate enthusiastically. As I am unsure why the little guy is flashing, I dosed the tank with Kordon's Ich Attack as it says that it treats other problems as well. Also because it is 100% organic and safe for the biofilter. Anyone have any other ideas about why he is flashing and what I should be doing?