Can I lower water temp without a cooler?

It gets really hot where I live right now. Like 39 degrees(celsius) a few days ago. House temp is also very hot, 26C. With the heater turned off, my tank still sits at about 26-27C. Yesterday I got some new rcs. I heard that they can live in up to 30C, but I want to get it to about 23-24 since that is the comfort temperature for everything in the tank. Could this be possible without a cooler?

 

House temp is also very hot, 26C. With the heater turned off, my tank still sits at about 26-27C.

Completely fine, I keep my tanks at that temp year round (admittedly, I keep fish from the Rio Negro which is quite warm in comparison).
At about 30°C the dissolved oxygen drops dramatically, so you only have to keep the tank below that.

but I want to get it to about 23-24 since that is the comfort temperature for everything in the tank.

In the wild fish have to deal with day-time related fluctuations of temperature, aswell as seasonal fluctuations.

During summer you can just keep the temperature below the mentioned 30°C and then let it cool down again towards fall. Usually that triggers spawning activity as well.

 

It gets really hot where I live right now. Like 39 degrees(celsius) a few days ago. House temp is also very hot, 26C. With the heater turned off, my tank still sits at about 26-27C. Yesterday I got some new rcs. I heard that they can live in up to 30C, but I want to get it to about 23-24 since that is the comfort temperature for everything in the tank. Could this be possible without a cooler?

Hey,

I am having this problem right now.
I have one option, the one that I use.
I had to do 3 cold water changes yesterday. Also put some crushed ice, from pure spring water in there.

It's getting very annoying, and causing me so much stress, I have to keep checking the thermostats every few minutes.

Anyway, hope this helps. Best of luck!

 

I see that you are new here, welcome. I will try using ice, but I can't do that many water changes since I use bottled water. Thanks!

 

but I can't do that many water changes since I use bottled water.

That's pretty expensive long term and makes you dependend on that stuff, preventing for example emergency waterchanges. Better look for an alternative asap.

 

My water comes from a well and is very, VERY hard. I don't remember for sure, but I think it also had a lot of calcium or some other mineral. I don't think dechlorinators would be enough.

 

I like to fill one of those big soda bottles with water, freeze it, and stick it in the tank for a bit when I need to lower the temp. Might be worth trying to see how much it can bring the temp down

 

Welcome to Fishlore! Sounds good, thanks!

 

My water comes from a well and is very, VERY hard. I don't remember for sure, but I think it also had a lot of calcium or some other mineral. I don't think dechlorinators would be enough.

I can only advise to take a look at RO-units. They are affordable for home use nowerdays and will pay off quickly.

 

I did think about those in the past. Though they are not very affordable in my country. Cost-wise, I'm better off using bottled water like I currently am. Maybe it's worth it for the quality though.

 

Shift to aquarium to a cooler room... away from sunlight...
Add more air stones...
Freeze some water in a bottle and put it inside the aquarium....

 

You can get an aquarium fan. Something like this: https://www.amazon.com/LONDAFISH-Aquarium-Chillers-Cooling-Marine/dp/B07FCJGZ4H/.

Worked well for me to keep my tank cool enough in the past, and that's with it being in the garage where temps can get to like 40 celcius.

 

Frozen bottles are good or those freezer packs that keep cool bags cold. I've started using those this summer as well.