Here's a thought:
Now, I'm sure many people will disagree with me, even though I've smoked my own product WITHOUT FLUSH in DWC.
Flushing, is designed to remove EXCESS chemical nutrients from the medium and cause the plant to use up internal stores.
STOP. Let's think for a second. Coco/Soil(with Chem Nutes)/Rockwool are ACCUMULATING MEDIUMS. What does this mean?
It means, when you fertilize those mediums, NOT ALL NUTRIENTS ARE USED BEFORE THE NEXT FEEDING. This creates a
BUILD UP of nutrients that are NOT BEING USED. This is why when someone fucks up their feeding they FLUSH the medium
adjust the feed schedule. A plant that is being fed LESS THAN 1500PPM should not have excess nutrients/chemicals in the root
zone.
In DWC the medium (as in water, assuming no top drip) DOES NOT accumulate. The only nutes available are WHAT IS IN THE WATER.
If you do not OVERFEED (above 1500ppm - YES, you can go higher than 1500ppm *however* NO STRAIN NEEDS IT to thrive) there
is no need to flush. Why would starving your plant help it?? Starving an animal/person only opens it up to disease/pathogens.
-Base point: As long as you lower your ppm/do not overfeed - in *DWC* you should not NEED to flush!!! You can do it if you want,
but if will reduce yields. 3 days shouldn't hurt.
One other point - What pH does cannabis flush best with? If it is *WATER ONLY* you don't need to pH it!!!!!!!!!!! Why? Because we
adjust pH to increase NUTRIENT UPTAKE EFFICIENCY!!! NOT WATER!!! I have seen NOWHERE on ANY CHART, where a plant will drink
water only if it's at a specific pH -OR- that a plant can only take up water if it's pHed!!!
Let's stop pushing rumors, and people's opinions over SCIENCE.
P.S. Clearex and many/most other "flushing agents" are SUGAR WATER. Go read the label - glucose and sucrose. Aka. Sugar.
As far as greenfox is say, that all "professionals" flush... that doesn't make them correct or conscious of the actual molecular reasons. SALT aka CHEMICAL based nutrients are salts because of SOLUBILITY. Aka, it can dissolve in water. Once they are taken up by plants, they are CONVERTED, from salts, into different compound required for plant metabolism. The main thing with CHEMICAL NUTRIENTS, are that they are in plant usable form, and are *forced* into the plant through a difference in osmotic pressure.
I know a number of professionals, have discussed science with them, and a lot of people can't agree. This is mainly because they DON'T KNOW SCIENCE. I'm taking people who run 200,000 watt warehouse dispensary grows. The same people who ask me when they can use Eagle 20 for PM (remains in plant 50 days, is carcinogenic) and people who light off bombs in FLOWER. And these are professionals... as in they get PAID to grow weed. Granted, most of them got paid the same or less to grow weed, as I got paid to recommend the appropriate remedies and nutrients for clients.
I see A LOT of "professionals" who don't know very much, and a lot of professionals with big heads because they grow weed. Well... if you knew what you're doing, why grow weed for someone else? And why do they come to me, asking advise, when they're "professional/commercial" and I'm just some small timer who actually cares about learning, trying new methods, and studying rather than telling everyone who will listen about my "donkey dick colas..."