Anyone had any problems with aggressive cardinals? I had 3 Molly fry (almost 3 months old) in a 30 litre tank with 6 new cardinal tetra first 2 days were fine, went to work came home and there was only 1 Molly I’ve searched the whole tank, removed all plants and decorations temporarily couldn’t find them, dismantled my filter and they hadn’t got stuck in there either, they’ve just vanished into thin air it seems, can’t find any remains or anything