I live in the midwest and don't have central a/c. I have a wall unit but typically only run it when it becomes miserable (mid high 80s and humid), otherwise the expense is enormous. Currently the highest I have seen the tank temperature get is 81 when my apartment thermometer also said 81. I have a 3 gallon tank with two adfs (one male, one female.) No filter, heater is out, and I haven't been using the light. The tank is located on a table in the middle of two rooms on a wall. I typically have a window open to regulate the temperature somewhat in my apartment and they are in that path though 10-15 feet away. I have two questions:
1) What is the highest temperature the tank can get before I should be worried?
2) Any ideas how to cheaply cool the tank? This has to be something that is safe and used when I'm at work or on vacation.