Do you have a way to test the PPM of the salt in the pond?

If not, go buy one of these and end the guesswork! https://www.amazon.com/dp/B08GC7JCV...Y2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

That will tell you how fast the salinity dissipates too.

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).