Just make sure not to put in really cold water, the sudden drop in temperature can put your betta into shock and thats not good. I think the best thing you can do is get a zip lock baggie and put a piece of ice in it and then put that in the filter and that should slowly cool down your tank :o
Allister-A something something Double Tail! <3
Little Man-Fancy Koi HMPK <3
Ricardo-my first baby
Splotches-the fish I had for one day.
Crooks-my grumpy old man.