Question
I have a different kind of cichlid fish and I live in Lahore, Pakistan. It's summer time here and the temperature is 50°C in day time and 32°C in night.
My fish tank is about 45 Gallon and the temperature in the tank was 35°C... But I tried bringing it back to 32°C.
In the last two weeks my 6 fish died. They were big and healthy. No disease or wound. Still they are dying.
Can anyone help? :(
Answer
Having the temperature too hot will have many bad effect on your tank as you found out. Livestock, and plants will die, algae will grow crazy etc.
One thing to keep in mind about high temperature water is that it contain less oxygen than cooler water. So make sure you have a good surface agitation. You can also add and air pump to help with gas exchange.
If the situation is temporary, this doesn't seem to apply to you, there are many way to cool the water a bit. Having a cold water bottle floating in the tank, do a small water change with cooler water, and probably a lot of other things. In you case since the situation is not temporary, I thing your best bet would be to invest in an appropriately size chiller for your aquarium. I'm sure there are other options less costly than a commercial chiller. By searching quickly I found this video here about a cheap diy solution. It might be worth a shot before investing big money on a chiller.
Anyway I hope this gave you some idea and that your fish will stop dying
Answered By - Rémi