You could have use the florakleen every day to flush them quicker there was no need to use just water. The florakleen does not adhere to the cell wall of the plant so you can use it right up to the day you harvest if you want to.

But what you should do is monitor the PPM before and after and watch for how much it changes in 24 hours. You should not have more then a 50 ppm change after 24 hours then you can harvest.