I need some help! Seedlings not doing well.

[GoAuto6]

I agree its time to be giving them juice till run off.

 

[DJ High]

Wait for it to completely dry then test run off

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I just tested run off and it shows 5.9ph. The one did not make it so I did a 1 gallon flush ph'd to 6.0 in order to test the run off and the the results I got were already mentioned. So I am gong to do one more watering (half gallon) with MagNifiCal at 1/4 strength and the enzymes at 1ml per litre (as per the instructions) and all ph'd to 5.8 - 6.0. today and then pop one more seed in water for germination.

BTW the other plant has not grown any more and looks a little pale but I believe it will make it if I am careful. Presently giving full veg nutes at 1/4 strength.

 

[GoAuto6]

Run off sucks bud! Have you thought about getting the accurate 8 soil probe? It's a bit pricey but we'll worth it.. I have an equation some where for run off calculating verses soil pH.ill look for it but the probe is so much better.

 

[DJ High]

Run off sucks bud! Have you thought about getting the accurate 8 soil probe? It's a bit pricey but we'll worth it.. I have an equation some where for run off calculating verses soil pH.ill look for it but the probe is so much better.

From what I understand you take your tap water ph and then your runoff and find the average of the two and you get the approximate medium ph (coco coir in this case). Than being said...the water I used was ph'd at 6.0 ....the run off was 5.9 therefore the soil should have about a 6.0 ph...am I correct? And is 6.0 not the recommended run off ph for coco?

What do you contend is wrong with my run off PH?

 

[GoAuto6]

Yes... Give me a bit and I'll find the equation I'm thing of..JM has a thread called pH explained on site try to find it. It give me some time, It's be a great read.

 

[GoAuto6]

I found it.

Rough Calculation Guide:

Here's some good info on ph.....
If your runoff pH is higher than your starting pH, use this equation to determine your soil pH:*
Soil pH = Runoff pH + Difference

If your runoff pH is lower than your starting pH, us this equation:
Soil pH = Runoff pH - Difference.

For example, say your the starting pH of your solution before it goes in is 6.5 and the pH of your runoff is 7.0. The difference is +0.5, so using the above equation:
Soil pH = 7.0 + 0.5*
Soil pH = 7.5

If your starting pH is 6.5 and your runoff is 6.0, your difference is -0.5 and using the above equation:
Soil pH = 6.0 - 0.5
Soil pH = 5.5



- This piece contributed by Goauto6 :thumbs: :clap:

https://www.autoflower.org/threads/ph-potential-hydrogen-the-manual-polled.12594/

 

[GoAuto6]

https://www.autoflower.org/threads/ph-potential-hydrogen-the-manual-polled.12594/

check it out.

 

[DJ High]

https://www.autoflower.org/threads/ph-potential-hydrogen-the-manual-polled.12594/

check it out.

Thanks for the info (I bookmarked the page)! I did a read through and I like what I see! Based on what I read I can then assume that the PH of my coco is 6.0 and sits close to the sweet spot for coco. I will attempt to lower the overall ph of the coco to 5.8 (-0.2) (which is said to be ideal for the medium).