[4kali]

hi madgiz and yosser
madgiz do you use the same method as yosser, after explaining the all process of osmosis in your previous post i cant see how you can.i for one have never used yossers method and personaly would like to see my p.h drift up and down through the various bands,each to there own i guess.
i know c.f posted earlier and would really like to hear is opinion on this
thanks in advance people
4kali

[madgiz]

4kali, on 04 May 2012 - 04:00 PM, said:

madgiz do you use the same method as yosser,

No I never topped my tanks up daily. Instead I tried to keep the food flowing in one direction and into the plant, I would set the Ph at about 5.5 and let it drift up to 6.3 throughout the week and keep the EC steady by not over feeding my plants..

[4kali]

thanks for that madgiz
how often do you flush useng this method.it is only my opinion, but by useing the method you describe, then surely the ph will start to come down, its got to.weather that takes one week or 10 days its going to start throwing waste back into the tank by this i mean ph falling, thats what we want it to do isnt it otherwise were defeating the all object of n.f.t, when a plant shits in for example soil it remains there causing all kinds of problems.with n.f.t if we take the info we gather from our p.h and e.c pens we are able to know exactly what is going on
please correct me if i am wrong madgiz
cheers 4 kali
also can i ask how high of an e.c do you actually feed in flower i know your base is 0.8 beore any nutes are added.
thanks in advance

[sensiblue]

Have a read of this mate.

The plant itself may be the largest contributor to pH changes in the nutrient solution.

The solution is made up of positively and negatively charged ions, called cations and anions. As the plant takes up these charged nutrient ions it gives off an H+ or OH- ion via the roots in order to keep the charge balanced between the solution and the plant tissue.

When a positively charged cation, like K+ is taken up, the plant puts out an H+ ion.

When a negatively charged anion, like NO3- is taken up, the plant puts out an OH- ion.

pH is a measure of the H+ concentration, so you can see how the plant can affect it depending on what nutrients it is most using at any given time in the grow.

For example, during the flowering period cannabis uses relatively more K+ than it did during vegetative growth. So the plant is putting out more H+ ions, which will cause the pH to drop.

Conversely, during vegetative growth the plant is using more N, which is in the form of NO3- mostly in hydro nutrients. So the plant is putting out alot of OH- ions, which will tend to increase the pH.

[trichomedome]

Bigboy23, on 30 April 2012 - 10:17 PM, said:

I'm on week 5 of flowering, my PH has dropped and my EC has risen. For example, the PH was 5.7 and EC was 2.2, this was done last wednesday, however my PH is now 4.6 and my EC is 4.7!!

I change my nutes on wednesday, Should I just put PH Plain water in from now untill then? Or Keep them as they are. They are not showing any funny signs or anything.

For the second time more info needed. Going by the replys it,s nft ? but i don,t know you,ve not said and it,s not in your profile.

This post has been edited by trichomedome: 15 May 2012 - 11:52 AM

[trichomedome]

sensiblue, on 15 May 2012 - 11:33 AM, said:

Have a read of this mate.

The plant itself may be the largest contributor to pH changes in the nutrient solution.

The solution is made up of positively and negatively charged ions, called cations and anions. As the plant takes up these charged nutrient ions it gives off an H+ or OH- ion via the roots in order to keep the charge balanced between the solution and the plant tissue.

When a positively charged cation, like K+ is taken up, the plant puts out an H+ ion.

When a negatively charged anion, like NO3- is taken up, the plant puts out an OH- ion.

pH is a measure of the H+ concentration, so you can see how the plant can affect it depending on what nutrients it is most using at any given time in the grow.

For example, during the flowering period cannabis uses relatively more K+ than it did during vegetative growth. So the plant is putting out more H+ ions, which will cause the pH to drop.

Conversely, during vegetative growth the plant is using more N, which is in the form of NO3- mostly in hydro nutrients. So the plant is putting out alot of OH- ions, which will tend to increase the pH.

Very interesting sensiblue, i used smart trays for years and always at week 6/7 the p.h became near uncontrolable, i was able to run it in at 4.0/4.5 and within 10/14 hrs it was up to 5.8/6.0, i called a load of various hydro companies etc trying to find out what was causing the ph problem ? i never did get an answer. Hence prefering rtw now but not totaly i still use smart pots for auto,s/mothers ? Thanks sensiblue i,ve been curious about that ph thingy for years top notch. TCD

This post has been edited by trichomedome: 15 May 2012 - 12:14 PM