i just set up a tank about a week and a half a go i have a minifilter and a mini heater in it a fake plant and a real plant in it i started out by putting in 1 guppy and its still alive my dad got 3 more and they all dies but it was my dads fault because he only let the bag temperature get to the tank temperature for 5 mins so they all dies so i got 3 back and i had 4 now today another on dies what am i doin wrong