Pk13/14 and flawless finish usage.

You use PK additives alongside your normal nutrients. So every time you feed nutes you give PK (When you want to use it) and this is what I found on flawless finish: "simply apply flawless every watering during your flush period. Try to get around 20% runoff from the bottom of your containers each application." Flawless finish has chelates in it so it will dissolve build up salt and make them usable for the plant again but if you don't get any runoff the salts are not flushed but the plant should be able to use them better.