Flush in DWC, how did my water go from 150 to 1200 ppm?

Gary Goodsen is a notorious asswipe. nothing new there.

Airwalker16 said:

Gary Goodsen is a notorious asswipe. nothing new there.

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Lol but was I wrong? You know microbes aren't gonna make your ppms jump from 150 to 1200ppm. And you're familiar with dwc, so you also know how salts build up in the medium and even the root system.


But what you don't know is this south cross dude is a racist trump supporter.

Might I suggest not sticking up for that guy? If you wanna go at me(which I understand, I went at you before) let's do it in another thread. This guy is not worth sticking up for.

SouthCross said:

Again. Produce an explanation. Show him how incorrect I am. For the sake of helping this person. Do something constructive.

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It's simple osmosis and diffusion. Bacteria can't create ppm's out of nowhere - and in hydroponics the nutrients are ALREADY available to the plants in a liquid form and do NOT need to be broken down first. That's the whole idea of hydroponics...

During most of the plant's life, the ionic concentration in the nutrient solution is slowly being raised. By the time the peak is reached in flower the plant, and roots, are loaded with ions. When you lower the ppm's to flush, you are making the solution LESS concentrated than inside the plant and nutrients begin to diffuse OUT of the plant and back into the solution - raising it's ppm. At the same time, osmosis cause WATER to flow from solution and INTO the plant. Both processes happen until an ionic equilibrium is reached. Then you lower the solution strength and start it again.

Ryry94 said:

Second harvest with a DWC setup and I'm not sure what I'm doing.

Week 8 and one of my plants is looking close to finished so I started flushing 7 days again.

Last night, drained the bucket and ppm was 1200 but I Never fed over 800ppm. Filled the bucket with tap water (150 ppm from the tap) and tested about 12 hours later at 400ppm.

So is the plant pushing out all the nutrients? Where is this ppm coming from?

Can I or should I change the water more often to keep ppm as low as possible in the bucket?

Thanks y'all!

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Most likely it's mainly from nutrient salt buildup. 400 is still quite low and I wouldn't worry about it. I use hard water for my hydro system and it's close to 300. Personally on my last reservoir change I fill with fresh water, peroxide and let it run for about a half hour. Then I drain and refill with fresh water and peroxide again. Wait for the water temps to stabilize then Ph 5.8-6.2. Your pics look great. You're doing it right!