Hot day, rising tank temperature

sdleigh

Member
Jan 9, 2011
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Barnsley
Being a REALLY hot day these last few (im much more of a winter bear, i hate sun!) my room temperature is 24.5, and my water temp has risen to 26.3 when i keep it at 24 usually. i have a fan on but its just pushing warm air round, i dont have anything like an AC unit, all windows are open, iv now turned off the heater to hopefully allow it to get at room temp.

these current temps wont effect my current fish much, but soon im going Malawi and i hear they are by effected temperature.

What does everyone else do for this, particular any people in hotter countries that have this problem regularly

cheers
 

FF MkII

Retired Staff
Apr 28, 2009
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North Yorks
Leave the lid open to allow the heat to escape. fill a large bottle of water and put it in the freezer then once its frozen let it float in the tank to help a little. you could aim the fan across the surface of the water.

Im not too up on malawis but is a 2c rise really that dramatic?
 

bigbird

Pleco Profiles Moderator - RIP FRIEND
Sep 9, 2010
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Sydney, AUSTRALIA
Hello,

We never get hot days downunder :whistle:, however would suggest the following.
1. Turn off the aquarium lights
2. Be careful with turning of the heater, as outside temps might no be equal everywhere, maybe reduce the heaters themselves 2C but monitor that.
3. Take off the lids
4. If you have fan, place it so it blows over the water
5. As stated get a 2liter or so bottle fill with water , freeeze and then place in tank, again be wary of drop in temp in the tank, that is why I suggest to leave heaters on but reduced temp
6. Invest in an aquarium cooler, costly but another option
7. open your windows etc for air flow

anyway hope this helps. cheers jk :thumbup:
 

rpp1973

Member
Apr 26, 2009
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Dont see the logic in turning the heater off as they will probably thermostatic controlld so will not come on anyway.
have used a fan accross the water surface in the past and this works ok.
 

sdleigh

Member
Jan 9, 2011
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Barnsley
Lol I turned off the heater as it seemed the water temp was always 2c above room temp, which i thought it maybe to do with heater. Anyway i reattached it shortly after as i though they had to be another reason, i finally stopped rising when it got to 28.5, thats a more than 4c rise, which is alot anit it? Not a breeze outside so, window thing didnt make a differece. I thought of the freezing water thing, and it worked stopped it risibg and started down down, did a 15% wc too, which helped. As room temp got to 30! :S Cheers guys
 

FF MkII

Retired Staff
Apr 28, 2009
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North Yorks
One thing to do.....Dont worry. As long as you have plenty of aeration the rise in temperature shouldnt be a problem. In the wild the temperature doesnt stay 24c.
 

sdleigh

Member
Jan 9, 2011
75
0
6
Barnsley
One thing to do.....Dont worry. As long as you have plenty of aeration the rise in temperature shouldnt be a problem. In the wild the temperature doesnt stay 24c.
lol i think thats my main problem... i worry lol ill try to learn to keep my cool (no pun intended) i already have alot of aeration, but thaks for the tip :thumbup:
 

Brengun

Global Moderators
Staff member
Apr 22, 2009
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Burrum Heads, Queensland, Australia
Pfft a hot 26C? Bigbird is telling porky pies, we do get extreme heat in Australia and I am talking extremes.
For heatwaves of 45C use all of the following measures. Fortunately our usual Summer temp in my area is about 32C which is still uncomforably warm.

Many areas use reverse cycle airconditioning which is fantastic when its working. During storms or excess usage during a heatwave it is possible the electricity may be off though.

For a cheaper running cost option, use fans blowing across the tanks water (you can buy little low watt ones that peg onto the side of the tanks), or an evaporative cooler which you can fill with water or ice.

You can also prepare for a hot day by freezing down bottles of ice. Place the whole bottle in the tank and just let it float around in there.

Forget about tank lights in Summer, they will heat the tanks as also can UV systems connected to filters. I tend to keep even room lights off and the fishroom door shut until about 4 in the afternoon to keep as much cool air from cooler overnight temps trapped.
I run overhead lights late into the night and feed much later so the plecos do have a day time.

If you are worried about fish jumping out since you have taken off the glass lids from all the tanks, cut yourself some egg crate lids or steel mesh and weigh them down with something so the fish cant knock them off.

Move that surface water around with as much air bubbles as you can as fish will require high oxygen, particularly fish who dwell in the bottom half of the tank.

Have yourself lots of battery backup to run air pumps if the power goes off.
 

bigbird

Pleco Profiles Moderator - RIP FRIEND
Sep 9, 2010
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Sydney, AUSTRALIA
i thought my smiley :whistle: would have indicated that ?
cheers jk :thumbup:
PS is SYD last year we had 48C that C :cry:
 

bigbird

Pleco Profiles Moderator - RIP FRIEND
Sep 9, 2010
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Sydney, AUSTRALIA
ok one very last tip I use when it is extremly hot is the following.
Extend your airhose by about 4meters, attach to your airstone, coil as much hose as you can in a bucket, put a small weight on it so it stays low, fill the bucket with ice and add some water. Then turn on your airhose. What happens is that the air going through these tubes get cold and is pumped into the tank. cheers jk :thumbup: