Vanishing Guppies?!?!?!?!?

my angel hasnt eaten my guppy yet (shes 3in long, when she gets bigger i'm going to update to a 125 so she won't be tempted to eat my little fish)... maybe the angels that ate guppies were underfed. and your tank has some problems to begin with-neons, harlequins, gl tails, and glowstick tetras prefer 6+ schools. silver sharks are bala sharks-they get 16in, very fast swimmers, they jump, and need 70g+ tanks. thats what you should have anyway with all those fish. and the silver sharks, if they are at least 5in, are probably whats eating your guppies. they are supposed to be in a larger fish community, not with all those little ones. and i thought bumble bee gobies were brackish... well i read something that said they were. also, when angels get larger, they use neons as a natural food source.