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First DWC. overwhelmed with names and chemicals and additives

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First DWC. overwhelmed with names and chemicals and additives

User59204626117 727 Replies 77,865 Views
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Ok I calibrated it perfectly. Did a few test runs with it. Returned back to the calibration solution and it still seems off. I really don’t trust this POS.

It’s saying my res is around 5.4-5.5 though.

also. Is this ph down as bad as the guy said? He said it’ll eat through concrete and warned me not to get any on my hands as if it’s pure poison.
 

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Ok I calibrated it perfectly. Did a few test runs with it. Returned back to the calibration solution and it still seems off. I really don’t trust this POS.

It’s saying my res is around 5.4-5.5 though.

also. Is this ph down as bad as the guy said? He said it’ll eat through concrete and warned me not to get any on my hands as if it’s pure poison.
Lol no no... its fine.
 
When you put it back into the calibration solution how far out was it?
 
So my hydro girls should be happy then?

Soil ones I’ll have a tad higher of a ph.
 

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Seal thise up good and can use em to verify the ph pen as ya go. May want to every time for the first bit until you see how well it holds the calibration
 
The soil will adjust the ph. May want to mix seperate nutes next time though

I do. The soil ones are in milk jugs. Usually one or two are pre mixed as my solo cup needs to be fed every 6 hours... stupid solo cup competition.

And the hydro is its whole separate thing that uses different water.
 

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are you sure the temperature of the water is as pointed on the packaging?
Great point I think you want 25c water temp for calibration. Some have auto adjustment but not sure I would trust that on a cheap meter.
 
are you sure the temperature of the water is as pointed on the packaging?

Yes. Although I don’t see why it matters. Every 5 degree temperature change is hardly even a significant difference in the ph of the solution. 20-30 range is damn close.

but yeah. I cheated and added a tiny bit of hot tap water (non distilled) to get the temperature from 21 to 25c. This caused my solution to be around 40ppm. Hope thats ok.
 
A 40 degree temp difference and it doesn’t even drift by one tenth. It’s a swing of like .04 each way. Sure isn’t much
 

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Yes. Although I don’t see why it matters. Every 5 degree temperature change is hardly even a significant difference in the ph of the solution. 20-30 range is damn close.

but yeah. I cheated and added a tiny bit of hot tap water (non distilled) to get the temperature from 21 to 25c. This caused my solution to be around 40ppm. Hope thats ok.
Would have put the container in a bath of warmer water. I cant say for certain but should be ok
 
Yeah looking back I could of dealt with 20c easily. 6.86 versus 6.88. Close enough for me. Oops. I only added a tiny amount. Maybe 1:20 or less to warm it up a little.
 
I’m still a tad iffy about it. Trust issues. I feel like something as important as ph needs to be bang on. No fking around.

I’ll give this pen a shot and see how it goes.
 
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