How can I cool the temperature of my tank during when I am in school?
I recently got my new beta fish which I absolutely adore. And I want my new beta to be happy about his new home. The thing is that I am very scared about the temperature changes when I am not at home. Right now it is summer and I am worried if my fish would die with heat. I need a method to keep my aquarium cool. I had a suggestion of keeping the air con on during school, but I don't want to use my air con as much as possible, bcuz I want to save energy... Does anybody have any suggestions for this? I really need help...:( Thank you !