I say flush but not to to much. Just enough to set things right again. Dont go 3x your container size on this one. I say just the same gallons as you have in the pot. % gal pot gets 5 gal water for this one
But of course pics would help
I have a problem please help my leaves are really dropping as if they are dying can I salvage them the botto leaves they are turning yellow to I have a pictiure of one but they all turning the same at first they were quite bushy and plenty if leaves now its as if they are less leaves more spaced out.
Flush and make sure the water you use is ph balanced. You should see some results in about 72 hours or so. Keep a close eye on them, this does not happen overnight.