PH questions

[Gquebed]

Just wondering... after dropping 160 litres of nute mix by almost a full 2 points with just 10 ml of GH pH down... wtf!!??

...is the potency different between different pH down/up manufacturers?
... does ppm or EC strength of nute solution have an effect on pH adjustments? IE does a higher concetration of say 10 gal nute mix need more pH down than a lighter concentration 10 gal nute mix to make the same adjustment?
... does temp or constant temp fluctuations have an effect on pH?

New to hydro style growing...

 

[rkymtnman]

is the potency different between different pH down/up manufacturers?

yes

does ppm or EC strength of nute solution have an effect on pH adjustments? IE does a higher concetration of say 10 gal nute mix need more pH down than a lighter concentration 10 gal nute mix to make the same adjustment?

yes

does temp or constant temp fluctuations have an effect on pH?

i'm pretty sure it does but your res temp shouldn't be varying that much to make much of a difference

 

[Bigworm4201982]

Tap water or ro water?

 

[Gquebed]

yes

yes

i'm pretty sure it does but your res temp shouldn't be varying that much to make much of a difference

Thanks.
I grew in promix before for years and only ever used one nute line and one adjuster line.

For hydro i switched to GH everything and making some discoveries...lol

 

[Gquebed]

Tap water or ro water?

I dont see how that would make a difference.

 

[rkymtnman]

For hydro i switched to GH everything and making some discoveries...lol

i'm a GH guy too. i use the 3 part for veg and the maxibloom for flower

and their silica
and ph up /down

 

[rkymtnman]

I dont see how that would make a difference.

huge difference. ro takes much less up/down to affect pH

 

[Bigworm4201982]

I dont see how that would make a difference.

It makes a huge difference. Ro water has nothing to buffer and tap does.

Tap water takes a shitload more ph down to adjust than ro water

 

[Airwalker16]

i'm a GH guy too. i use the 3 part for veg and the maxibloom for flower

and their silica
and ph up /down

I'm thinking of purchasing megacrop, with their pro calmag and bud explosion.

 

[rkymtnman]

I'm thinking of purchasing megacrop, with their pro calmag and bud explosion.

i had pH troubles with it. you can search their thread about it.

is this the version 2.0?

if you really want something good to add to your GH, check out bioag cytoplus. kelp/humic/micro dry mix. a 100 g bag is cheap: only 0.5 g/gal to mix.

 

[Airwalker16]

i had pH troubles with it. you can search their thread about it.

is this the version 2.0?

if you really want something good to add to your GH, check out bioag cytoplus. kelp/humic/micro dry mix. a 100 g bag is cheap: only 0.5 g/gal to mix.

I do definitely like how well GH stays put..

 

[rkymtnman]

I do definitely like how well GH stays put..

i love GH but always felt something was missing. i think that stuff does the trick.

 

[Gquebed]

huge difference. ro takes much less up/down to affect pH

Thats because of ppms. Once you add newts to your RO water....

 

[rkymtnman]

Thats because of ppms. Once you add newts to your RO water....

not necessarily. with RO water and nutes it took much less than now with well water and same amount of nutes.

like the other guy said, well or tap has buffers in it that RO doesn't.

 

[Gquebed]

not necessarily. with RO water and nutes it took much less than now with well water and same amount of nutes.

like the other guy said, well or tap has buffers in it that RO doesn't.

Ahhhh.... didnt know that...

 

[70's natureboy]

and some people say GH PH down isn't strong enough. I don't need it any stronger.

 

[Gquebed]

and some people say GH PH down isn't strong enough. I don't need it any stronger.

Caught me by surprise...
I used grotek before and i would use about 5ml to bring down about 16 litres of tap water (250ppm) a full point. So... didnt think 10mls would do much to 160ltrs of RO water nuted up to 450ppm.

 

[Renfro]

and some people say GH PH down isn't strong enough. I don't need it any stronger.

I use advanced nutrients ph up and down. It's WAY stronger than GH (have those also). Takes like 10 percent of the amount I used with GH. I only use it for large tanks, small tanks get the GH.

 

[Gquebed]

I use advanced nutrients ph up and down. It's WAY stronger than GH (have those also). Takes like 10 percent of the amount I used with GH. I only use it for large tanks, small tanks get the GH.

I used to use soley AN all the time (not all the shit) in promix and it was top notch stuff. I couldnt understand why everybody bitched about price. Then i did the math on that going to flood tables and...
Oh.
I get it now....lol

 

[Serpentz]

and some people say GH PH down isn't strong enough. I don't need it any stronger.

I'm curious to know how strong the GH pH Down is? I'm using Plagron pH Min and I need only 4-5 drops for 15 liters of water at 7.5 to bring it down to 5.5 - 5.8.

What's in the stuff...
Water, phosphoric acid (56%). NPK-fertilizer (0-43-0). 43% water-soluble phosphorus pentoxide (P2O5).

To be honest I think it's a little too strong and its super easy to screw up without using a medicine dropper one drop at a time.