Well the forecast has 30 degree temp swings on offer this week so it must be springtime. For me this has been very educational with regards to my tank. I have no chiller,Im not planning one either.I intend to just keep the house at a nice 70F at all times and run the 3 fans I have (2 in the canopy one blowing over the sump). Temps here in summer are above 90 for months so we shall see if Ive planned well enough.