Hi everyone. I am posting to get some advice on my Halfmoon betta, Ryuu. He is in a filtered 10 gallon tank with three cory fish and is acting happy and healthy, but his water temperature is currently around 68 degrees. I live in the desert and the temperature is usually very warm in the house, but last night a cold front came through. This morning I noticed his heater wasn't working and I can't get it to come on. Of course, the only pet store in town closed about 10 min before I realized this. Again, he isn't acting abnormal or anything, but I am concerned since I know the temperature should stay around 80 degrees F consistently. I can get him a new heater first thing tomorrow when the store opens, but will he be alright overnight? What precautions can I take and what warning signs would I need to watch for? I am running the heater in the house but it tends not to heat up the tanks very quickly or efficiently. I also have his incandescent light on since that should warm up the water at least a bit. Thank you so much for any help you can give me.