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Old 07-07-2010, 08:57 PM   #1 
MustardGas
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Cooling down a tank?

Roscoe/Toothless' tank is being overheated by our unusually warm Canadian summer. Is 85 too hot to be kept at or is there a way to safely cool it down? I've also got two otos and seven shrimp, is that way too hot for everyone? They all look okay, and I don't want to risk thermal shock trying to get it cooler.
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Old 07-08-2010, 08:55 AM   #2 
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Most Bettas will tolerate high temp for short times and 85F is at their upper limits, as long as the Betta is acting okay-I wouldn't worry...
Depending on the tank size, live plants, decoration and filtration often the tank will have warm and cool spots that the Betta will find and stay in or move freely to and fro.
Ways to lower the temp if the Betta appears to be in distress from high temps: unplug the heater, lower the water level so the flow from the filter splashes more/better, place a battery operated small fan on the tank so it blows across the water, add ice to a zip-lock type plastic bag, make frequent water changes with the replacement water a few degrees cooler, monitor the temp closely and avoid too large and sudden temp changes.

Last edited by Oldfishlady; 07-08-2010 at 08:58 AM.
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Old 07-08-2010, 09:48 AM   #3 
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I too was having the same problem. I noticed that anything too high above 80 my betta started acting "funny." The other day I caught him resting on the bottom and rolling sideways, my tank was at 85. I turned on the air conditioning, did a partial water change and left the cover off my tank. Oldfishlady has a great idea with the ice in the bag, I'll have to give that a try.
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Old 07-08-2010, 12:16 PM   #4 
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If the aquarium has a solid glass or acrylic lid, you might wanna replace it with netting to allow heat to escape.
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Old 07-08-2010, 12:24 PM   #5 
Oldfishlady
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A few more things you can do that I forgot-remove the lid, turn off the lights, be sure and lower the water level so the fish doesn't jump out.....

I just read on a different forum-use old plastic containers and fill with tank water freeze and drop the frozen tank water in the tank...this would be best in the larger tanks and size appropriate plastic container to tank- to not change the water temp too fast
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Old 07-09-2010, 01:49 AM   #6 
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The heater's off, and the temp is now 88.5. Everyone seems to be acting okay, but I'm concerned that it'll have some sort of impact on their lifespan. I'll try keeping the hood open (it's just a regular plastic canopy) and lowering the water level.. I'm so worried about these guys. Might have to try the ice cubes in a ziplock bag.. though won't that cause cold spots that could cause some sort of thermal shock if they swim through it?
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Old 07-09-2010, 02:44 AM   #7 
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Nope, if there is movement from your filter then it all disperses. I'd definitely get it down though. That would be way uncomfortable for everyone
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Old 07-09-2010, 12:23 PM   #8 
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Success! Lid's off, water's lowered, lights off.. Final reading: 79.5!

Thanks guys, and my fish thank you too! (:
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Old 07-09-2010, 01:30 PM   #9 
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I'm glad I saw this thread. It got over 100 outside today, and if I can't get my tank to cool down I think I'm going to need to move it into a cooler room. These tips should help.
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Old 07-09-2010, 02:27 PM   #10 
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Yeah, I don't know where I'd be without these people :D

It's amazing how much a simple lid off/lights off/water lowered can do. Now I'm worried it's getting to cold for them! It's about 78 now :P
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