need a quick flushin meathod

my plants are 50 of 60 days I just noticed immature seeds starting wanted to harvest asap since im so close without the seeds to mature

You might as well switch the light cycle to 10/14 and let the bud finish maturing and flush with pure water. I think it would be better to have mature seeds that you could grow into other plants than having a bunch of little white specs of seeds in your bud that you'll never get out.

Flushing with a mild nute solution leaches more salts than water. Flush twice and harvest in 5 days.

Or you could get some Final Phase..