EC Levels after Final flush?

Where should EC levels be at when final flushing? Coco medium. no drip. just hand. right now i am at 220ppm(hanna)...should it be even lower?

I know there is someone here that can help come on!

That's probably fine. There's a lot to be said for not having a massive difference in osmotic pressure - I believe that's what flushing solutions are all about, maintaining an EC similar to previous levels without having any available nutrients for the plants. 220ppm is probably a pretty nice compromise. See how it smokes and adjust for the next time if necessary.

I stagger mine (ppm) on downward levels till I get to 100-120 at the end.

Sounds good guys, humm ill mabe drop a bit now that i am going into another day here....thanks for the response!