Hydroponic pH and nutrient availability

[SoLowDoughLow]

Found it.View attachment 11856

So basically, if your ph is constantly dropping, something is out of whack

 

[yougrowyourway]

So basically, if your ph is constantly dropping, something is out of whack

Yea to me its usually you have too much nutes but apparently it can be just something is out of whack according to that list.

 

[Coffeeholic]

Probably same ppm at 900. Time to change out the rez. 30l rez. Water dropping, ph dropping, ppm static.

 

[Coffeeholic]

Yea to me its usually you have too much nutes but apparently it can be just something is out of whack according to that list.

I just checked ec is 1570.

 

[spyralout]

Weird, only time mine usually drops is if I overfeed them and the ppm raises.

I don't think I've experienced overfeed in hydro yet. Set a new res fill at 850 and epi was at 780 to try and steer the system up. 5.9 ph on both. Next day res is 2 gal lower and ppm 840. Epi dropped to 740. No drift on ph. Figured plants were taking in nutes like crazy so let's push it. Raised epi itself to 900ppm. Next day res 820 ppm, epi 820 ppm 6.0 ph. Let it ride. Next day res 800 ppm 6.1 ph , epi 780 5.9 ph. No leaf tip burn. Res decreases by 2gal every day. Wtf??

 

[Hogbackmagic]

I'm in Hydro. I've had the cheap pens and they tend to lose calibration quickly. I'm using GH PH test drops now. Easy to use and accurate enough. I usually start at 6.4 and let it drift to 5.8.

I had that same deal pens was not accurate well the cheap ones I also use gh ph drops and works fine

 

[Texagonian]

I don't think I've experienced overfeed in hydro yet. Set a new res fill at 850 and epi was at 780 to try and steer the system up. 5.9 ph on both. Next day res is 2 gal lower and ppm 840. Epi dropped to 740. No drift on ph. Figured plants were taking in nutes like crazy so let's push it. Raised epi itself to 900ppm. Next day res 820 ppm, epi 820 ppm 6.0 ph. Let it ride. Next day res 800 ppm 6.1 ph , epi 780 5.9 ph. No leaf tip burn. Res decreases by 2gal every day. Wtf??

You found the sweet spot and those ladies are loving it! Good job

 

[spyralout]

You found the sweet spot and those ladies are loving it! Good job

I think it was back then but now in late flower it's being finicky and wants real low ppm, like 300s. Ph keeps dropping too though so maybe it can go a bit higher

 

[Armdog]

I think it was back then but now in late flower it's being finicky and wants real low ppm, like 300s. Ph keeps dropping too though so maybe it can go a bit higher

my ph raises in veg and lowers in flower. I just set my autodoser to 5.8 and let it ride. if I run over 380 on ppm I get tip burn . 350 to 375 is the sweet spot for my rdwc system.

 

[Armdog]

my ph raises in veg and lowers in flower. I just set my autodoser to 5.8 and let it ride. if I run over 380 on ppm I get tip burn . 350 to 375 is the sweet spot for my rdwc system.

this just seams to be the norm for my system after 8 grows.

 

[spyralout]

this just seams to be the norm for my system after 8 grows.

Maybe all systems are different, regardless of system type? I've read varying things, but generally the ppm numbers that people are mentioning are lower than other systems. I think H mentioned that he runs 600 in veg and 800 in flower.
The auto doser sounds cool, I would love to do that some day.

 

[Armdog]

Maybe all systems are different, regardless of system type? I've read varying things, but generally the ppm numbers that people are mentioning are lower than other systems. I think H mentioned that he runs 600 in veg and 800 in flower.
The auto doser sounds cool, I would love to do that some day.

got it on sale for around $150.00 Milwaukee mc122, works great. only one doser but mine either goes up or down not both at one time.

 

[Armdog]

Maybe all systems are different, regardless of system type? I've read varying things, but generally the ppm numbers that people are mentioning are lower than other systems. I think H mentioned that he runs 600 in veg and 800 in flower.
The auto doser sounds cool, I would love to do that some day.

Amazon.com: Milwaukee Instruments MC720 Dosing Pump Kit : Industrial & Scientific

Amazon.com: Milwaukee Instruments MC720 Dosing Pump Kit : Industrial & Scientific

www.amazon.com

$215 on amazon now, but it can be cheaper if you keep looking, makes life a lot easier

 

[Armdog]

Amazon.com: Milwaukee Instruments MC720 Dosing Pump Kit : Industrial & Scientific

Amazon.com: Milwaukee Instruments MC720 Dosing Pump Kit : Industrial & Scientific

www.amazon.com

$215 on amazon now, but it can be cheaper if you keep looking, makes life a lot easier

Milwaukee Instruments MC122 pH Controller and Milwaukee Instruments MP810 Dosing Pump

 

[spyralout]

Amazon.com: Milwaukee Instruments MC720 Dosing Pump Kit : Industrial & Scientific

Amazon.com: Milwaukee Instruments MC720 Dosing Pump Kit : Industrial & Scientific

www.amazon.com

$215 on amazon now, but it can be cheaper if you keep looking, makes life a lot easier

this is ph only, no nutes?

 

[Armdog]

this is ph only, no nutes?

Yes only pH, I change my nuts out every 10 to 12 days

 

[Armdog]

Yes only pH, I change my nuts out every 10 to 12 days

Nutes, lol

 

[SoLowDoughLow]

my ph raises in veg and lowers in flower. I just set my autodoser to 5.8 and let it ride. if I run over 380 on ppm I get tip burn . 350 to 375 is the sweet spot for my rdwc system.

Im trying to find that sweet spot too. Just lowered my ppm to 365, it was way too high before

 

[spyralout]

Im trying to find that sweet spot too. Just lowered my ppm to 365, it was way too high before

How high did you hit in veg-early flower?

 

[SoLowDoughLow]

How high did you hit in veg-early flower?

Around 700 or 800 I think. I had a different ppm meter tho but it broke. It used a different scale. So probably more like 500 or 600