Hi Esshup,

I agree with you; relative humidity would be a critical factor. The thread I referenced was from Ryan B in Southern Ontario CA in July, I would anticipate that our summer time humidity is no more than in Ontario. As a happy coincidence the weather is least humid in summer and most humid (typically @100%!), at most other times.
direct link and data at bottom of page 2: https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=325786&page=2

I accept a fountain might not be as effective although I am not sure why it wouldn't be. I wonder if most fountains in small ponds have too low a flow rate to make a measurable difference and the large fountains in big waters are equally ineffective as the pond is just so massive. A 20gpm fountain is a lot in a garden pond considering a typical shower head might be 2.5gpm....

cheers

Last edited by Beardy; 06/06/21 08:32 PM. Reason: spelling