It depends on how the pond is fed.
If it's fed from runoff, then this summer it might turn rancid.
If it's a spring fed pond then it will probably be fine year round, unless it freezes.
I have a pond, and I let the horses drink from it until the weather gets hot. Then I try to keep them out of it.
They do love to take a dip in it on a hot summer day, but I really don't like them drinking from it during hot weather.
Honestly, it's really hard to say, you need to keep an eye on it.
For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.