African Clawed Frog

[John]

Probably the change in water temperature.

[jellybean]

Do you think the temperature change is pleasant or stressfull, causing him to croak?

[John]

It's simulating the change in temperature that heavy rain brings on in their natural habitat - this is when they breed. So basically you're telling him it's time to look for a mate. You could stop this if you make sure the water temperatures are equal when you change the water on him.

[scribbles]

I let the temperature in my African Clawed Frog tank drop a few degrees as it got colder, and at first the males wouldn't stop croaking.