*My* 55 gallon tank is at 80. Not OP's. I guess an option that *may* be viable is to use an ATO. Since that, you know, automatically tops off, you just fill it, and it refills the tank as needed. That at least allows the water to be at ambient temp instead of whatever's coming straight out of the tap. That would work for the capacity of the ATO, at least, which may not be as much as you do for a water change. Or a lower tech version of that is to have some receptacle that you can store treated water in the day before the water change, so it's at ambient.
So, roughly 30% increased temp 4 degrees for me. I'd not worry too much, since it looks like many African cichlids are good in the 76-82 range.
So, roughly 30% increased temp 4 degrees for me. I'd not worry too much, since it looks like many African cichlids are good in the 76-82 range.
