I live in Texas and I know some betta people that will take the heaters completely out on really hot days/weeks/months. We've had nearly two weeks of straight 100+ temperatures. x.x My heaters never kick on anymore, it's so hot.
Anyways, no new pics yet, need to put new plants in the 2.5, all I've got are some clumps of java ferns, a banana plant, and several pieces of dying bacopa, and some strands of anacharis. But I can't work on it at all cause I sprained my ankle. :( I can barely hobble over to feed my poor fishies.
Squidward, you can also use a regular fan as well.
Yup that's what I use on my tanks in my non-AC apartment when it gets hot. I discovered the trick by accident when I noticed how cold the water always was in one tank that was next to the fan I use for myself.
You can get little desktop fans at dollar stores or Staples for like $10 or less.
Also, check your power filters if you have them, some start getting hot once they're old or if the impeller needs to be cleaned or changed. I found an old power filter was heating up the water in one of my tanks. I cleaned it out but it's still getting warm, so I'm going to replace the tank. It's about 6 or 7 years old anyway and has a few design features I don't like (like impossible to use a standard hood with light).
maybe i should just do a 50 water change. and try to lower the water temp.
You could try that, but just make sure you don't make the new water too cold. You don't want to lower the temp by more than about 4-5 degrees F otherwise you could shock your fish.
I have an ongoing problem with high temps in my tanks (overheated apt in winter, no ac in summer), so I will sometimes do the water change method, as well as using fans. All of my tanks have heaters but I've had to turn them way down to like 75 F because the water is usually too warm.
I do have a window AC in my bedroom, so if this summer turns out to be too hot and I can't control the temps then I'll be moving them and possibly my tarantulas to my bedroom.