Cooling down an aquarium?

I know exactly what you mean, im going through summer at the moment and my tank temperature is alot higher than i want. The only way i've found that can bring the temp down safely is by doing small water changes with cooler water, i find that at least i can regulate that temperture....That ice bag idea sounds interesting, not sure if it will stress the fish out though.

The ziplock baggies would work short term, like if the air conditioning went out for 24 hours, but just are not practical long term. You should try getting a fan meant for aquariums, like the Zoomed Aqua Cool Aquarium Cooling Fans, that you would only need a small opening for. These are what I use. If necessary, you could cover the opening for the fans with crafting mesh (like you get at Michaels) so that the fish can't jump out, but the fan is still blowing into the water and cooling the aquarium. This would lower the fans output slightly, but should still cool the aquarium. Also, check on the temperature needs of your fish. Bettas at least do well in warm water, 82 degrees is still ideal for them, and they would be comfortable up to 86 degrees. If you don't like that idea, you could look into a diy yourself chiller, here is info on that: http://www.shrimpnow.com/content.php/137-DIY-Mini-... not sure how this would work on an aquarium as large as yours, but you might get some ideas from it.

1 do you have a heater?

2 a beta in a 35 gal? that's a damn lucky beta.

3 a fans a good choice

4 don't turn the hood lights on

5 get a smaller wattage light

6 do a partial water change and refill with cool water

7 DO NOT PUT ICE BAGS IN THE WATER it will make some areas much to cool while other areas will be unaffected.

the only way to cool it is to keep it out of the sun and have a cooler fan blow on the top of the water.

you can have any fan blow straight across the surface of the water.

if you are afraid of your fish jumping simply let the water level go down further.

your ziplock bag idea wont really work. i tried that before. i was even freezing gallon jugs of water and putting the ice in the tank.

I'd say keep the tank in a very dark, dark place which should cool the water a bit

get a lower wattage light, or keep your lights off. if there is a window somewhere in the room the fish won't be confused between night and day. so the light isnt necessary (unless you have live plants)