I have a 10 gallon planted aquarium. (Had) about 8 neon tetras a few white clouds 2 guppies and a midnight betta. OVERNIGHT!!! THEY ALL disappeared except my bristlenose and my male guppy. And I have NO CLUE why. I can't find bodies anywhere (bottom of tank, filter, ground outside tank) does anyone have any clue how or why? Or what other creatures could be lurking in my water?