Why one plant has yellow leaves

2feather18

Well-Known Member
Ph on point? Checked that plants runoff lately?
Yep I checked my pH water and pH nutrient what's a pH tester all OnPoint I bought a soil meter but I don't think it was reading correct.. all the reason why I say that is because it was a cheap one for $10 and I put it in all plants and it kept reading 7.5
 

2feather18

Well-Known Member
Don’t trust soil meters. You should get a ph pen and a ppm/ec pen too. Add your nutes check ph & ec. (Water your plants and collect the water that comes out the bottom of what you’re growing in) <—that’s runoff
Somebody told me that I can take a soil sample mix it in water and then test it like that but thank you for the runoff info.. I will do that next
 

2feather18

Well-Known Member
Don't worry about runoff right now. Get a proper pH test pen, and set your pH of the stuff going in. What medium are you growing in?
Smart Fabrics 3 5 and 7 gallon I have toget a proper pH test pen those are expensive I'm going to have to save up for that yeah I only test my pH levels put my water meter
 

spek9

Well-Known Member
Smart Fabrics 3 5 and 7 gallon I have toget a proper pH test pen those are expensive I'm going to have to save up for that yeah I only test my pH levels put my water meter
I have one exactly like the following. I bought it when I first started growing indoors, eight years ago. I check calibration every few weeks to a month, and I have never once had to re-calibrate it. I read 4.1 on the 4.0 pH control liquid, and exactly 7.0 on the 7.0 control. Only drawback I've found is that it can take 15-20 seconds to get a precise, stable reading.

I paid under $12 for it.

 

2feather18

Well-Known Member
I have one exactly like the following. I bought it when I first started growing indoors, eight years ago. I check calibration every few weeks to a month, and I have never once had to re-calibrate it. I read 4.1 on the 4.0 pH control liquid, and exactly 7.0 on the 7.0 control. Only drawback I've found is that it can take 15-20 seconds to get a precise, stable reading.

I paid under $12 for it.

So the run off I just catch some of that water from the pot and then test that with my meter
 

2feather18

Well-Known Member
So the run off I just catch some of that water from the pot and then test that with my meter
Hey what do you mean you check collaboration every month how do you do that am I missing something on our PH meters right I have like the same one as you
 

TheSadBadGrower

Well-Known Member
Hey what do you mean you check collaboration every month how do you do that am I missing something on our PH meters right I have like the same one as you
There is calabration solution that will help you make sure your PH pen is reading right. I used to mess with the cheap pens. Reading were very close to my Apera PH60.
 

2feather18

Well-Known Member
Don’t trust soil meters. You should get a ph pen and a ppm/ec pen too. Add your nutes check ph & ec. (Water your plants and collect the water that comes out the bottom of what you’re growing in) <—that’s runoff
Hey I just got a TDS meter so what's the idea levels I should have. I tested my tap water and it's 149
 
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