Hello everyone,I currently the owner of a 29gal. F.W. community tank up and running for a month 2day.I already have 5 different species,20 occupants in all:6 zebra danios,3(shwartz)corys,5 male fancy guppies,3seapae tetras,4 ghost shrimp.My current PH level is 7.2 and my ammonia level is 2.0-4.0. I let my cycle for 4days before i added my first group of fish(arranged in the order i got them)And i make water changes twice a week.Completely ignorant of the nitrogen cycle at the time,i got them all within a 4 wk. span,fortunately my constant water changes saved ma,hopefuly.Just recently i notice 1 of looks faded,he's a grayish pale color,he no longer swims with his mates,no fin rising when they face off U know,all he does is sits on the bottom by himself,or sometimes I'll find him floating just below the surface.I could tell someone's has been nipping at his fins alittle.What i want to know from his lost of color and strange behavior is he sick or is he just stress out from being bullied?And 2 days ago 1 of my danios has disappear,the last time i saw her(i'm persuming it was a female because of her protruding belly)looked like she something stuck in her mouth,and it look torn underneath,I don't know if she's alive or not.I'm thinking she's dead and stuck in one of my rocks.I haven't notice anything unusual or any discoloration in the water or foul odor in my water.Have this ever happen to anyone and what was the end result?