125g with 2 Oscar's and a couple of cichlids. Normally aggression is low to average. But for the past few days it has been super high I did a water change a week ago and everything was fine but today I noticed I lost a cichlid when I put my hand in with the net to remove the dead fish I noticed the water was very very warm I check the temperature was 94 degrees at the moment I only have 1 500 watt heater in there. Now this heater is the kind where the temperature control is outside the tank and you actually submerge the heater and a probe and I noticed the probe was actually hanging out of the tank so my question is would the probe being out of the water caused the temperature spike or is my heater bad?