pH Nightmare - Newbie Questions Continued

[JamieShoes]

Hello All,

I was sure my pH pen was being daft, so I got a new one and it turns out it wasnt. It seems that when I add rhizotonic (2ml or half a dose) to a litre of water, the pH goes from 6.4 to above 10? - now I'm confused. Should I be adjusting the pH to 5.8 AFTER I add food or before?


Should the pH of the feed I'm giving be 5.8? (I thought so) and if so, wtf is rhizo playing at?

ok so I got this one answered... you adjust after adding everything. so I adjusted from 10 to 5.6 and the ec was still just 0.3

(run off was 6.1 and ec of 0.6 - should I be concerned?)


cheers
j

 

[imtheman]

Hello All,

I was sure my pH pen was being daft, so I got a new one and it turns out it wasnt. It seems that when I add rhizotonic (2ml or half a dose) to a litre of water, the pH goes from 6.4 to above 10? - now I'm confused. Should I be adjusting the pH to 5.8 AFTER I add food or before?


Should the pH of the feed I'm giving be 5.8? (I thought so) and if so, wtf is rhizo playing at?

ok so I got this one answered... you adjust after adding everything. so I adjusted from 10 to 5.6 and the ec was still just 0.3

(run off was 6.1 and ec of 0.6 - should I be concerned?)

Yeah ive noticed the botanicare guardian rhizo solution raises the ph alot to. That should be pretty good. You just gotta dial it in and see what your strain does best at 5.8 is not a set number.


cheers
j

Yeah ive noticed the botanicare guardian rhizo solution raises the ph alot to. That should be pretty good. You just gotta dial it in and see what your strain does best at 5.8 is not a set number.

 

[jamrockjay]

I thought that if u grow in coco u need the ph at 5.8, i thought the ph is determined on the medium used to grow and not the strain? I thought u correct the ppm's according to the strain not the ph. So my question is which is right?

 

[dongle69]

I thought that if u grow in coco u need the ph at 5.8, i thought the ph is determined on the medium used to grow and not the strain? I thought u correct the ppm's according to the strain not the ph. So my question is which is right?

Both are right.
Different strains can have different ph and ec/ppm requirements.

 

[jamrockjay]

Thanks for that dongle69

 

[N707]

Hello All,

I was sure my pH pen was being daft, so I got a new one and it turns out it wasnt. It seems that when I add rhizotonic (2ml or half a dose) to a litre of water, the pH goes from 6.4 to above 10? - now I'm confused. Should I be adjusting the pH to 5.8 AFTER I add food or before?


Should the pH of the feed I'm giving be 5.8? (I thought so) and if so, wtf is rhizo playing at?

ok so I got this one answered... you adjust after adding everything. so I adjusted from 10 to 5.6 and the ec was still just 0.3

(run off was 6.1 and ec of 0.6 - should I be concerned?)


cheers
j

Your PH is not 10, that is a false reading.
The way a ph pen operates makes it very easy for the contacts on the pen to pick up ions that give false readings (or something to that effect)
Get a proper liquid low range ph test kit with the drops to find your actual ph.
Im not saying that all pens are inaccurate, rather that there are many cases in which an additive or certain solution can drastically affect the way the pen percieves your solution.
If you PH hovered at 10, Im fairly sure that you would have dead plants in short order. Ph pens faulter on occasion, I would not take thier reading as the last word on you ph, and certainly not a reading like that.