Im a first time owner of axolotls, i have 2 juveniles and they seem to be doing great (eats alot, exhibits normal behavior). My only concern is my temperature hovers around or close to at 74 degrees if i dont intervene and add frozen water bottles. i was wondering if blowing a fan towards the backside of the tank will decrease the temperature ( not across the surface of the water because i have a glass lid and im afraid if i leave my tank lidless my axolotls will jump out).