I always try to find out what the temps in nature do, even in parts of the tropics there is a seasonal shift. And some fish are healthier with a cool down, due to monsoon or mountain runoff in their home waters.
My Uruguayan fish are in a room that gradually drops into the low 60sF and water temps slowly reflect that change. After a cool down like that their colors are quite impressive.
My northern Mexican cichlids such as carpintus and beani are allowed to drop into the high 60sF, and my beani spawned in those temps. A little research can sometimes be quite surprising.QUOTE]
I was thinking the same thing, thank you for your input! I think temperature fluctuations are healthy and normal even with tropical fish.
They still cause stress in fish, maybe for some species its minimal, but I've always been told fluctuations are bad, in the winter it drops slowly and the ambient temp of the water doesn't change drastically, meaning you'd have to adjust your heater everyday or unplug it unless your house gets real cold at night.
I guess changes that occur over hours aren't bad, but when doing wc and you drop or raise the temp 5 degrees that's when it becomes negative, that rapid drop is bad.
I wouldn't say its healthy but nature is always harsh on animals anyways, a healthy fish should be fine regardless, but if its already stressed then that's just more stress
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