I had a heavily planted, fully cycled, 20 gallon long tank. I put 5 guppies and one honey gourami about a week ago. 2 guppies are dead, 2 guppies are missing (I can’t find them in the tank) and the one guppy and honey gourami are both fine. I’m assuming that the two I can’t find are dead but I am continuing to look for the bodies. Like I said, the tank was fully cycled and for the first couple days, all the fish were perfectly fine. Nothing seemed wrong. Does anyone have any ideas about what could have happened?