I have a tank 1.22x50x37cm and I started with a few guppies in it, I have since added over time, an angel, 4 tiger barbs, a small convict, 5 tetra's, 2 bronze cory's, 2 khuli loaches, 3 honey dwarf gourami, 2 blue gourami, an algae eater, 5 leopard danios, black ghost knife, common plec and a silver shark.
Tank was fine for 3 weeks or so and then my guppies started to be murdered by something, everyday at lunch, I'd come home from work at lunch and fine a couple of dead guppies sitting on the bottom of the tank.
I can't figure out who's the manic guppy killer, the angel goes into hunting mode at night and sifts around under the surface watching the fish on the surface once the lights go off, but he's always done that and he never killed anything before.
The black ghost knife is only small about 10cm long.
As for the convict i'm trying to get rid of him but he just seems to chase everything around.
Who do you think is the manic guppy killer?