paperfetti
Well-Known Member
this is the guy who is like our AL B. on a diff. site response :
I think that summizes the situation very well st0ney, good job with that man!
Id also say that the whole system of nutrients is a delicate balance of +ve and -ve ions, adding a certain element such as Mg usually has the effect of altering the potential with a sudden and drastic availability of the element within solution, the plant uptakes this solution and the problem is further compounded as the plant goes further away from centre...I have read so many growers say "wow the plants have gone really green bafter I added the Epsom Salts" (excess Mg symptoms) then a few days later its "my plant has stopped growing and is starting to yellow in the leaves" (Iron lockout).... as a further example or approach to the overall picture of nutrient solutions think of ph correction....adding ph up (+ve ions) to a solution that you have added too much down ie acid (-ve) to, it shouldnt be done, the whol solution should be dicarded. As it is in DWC, NFT, Dripper,etc etc in hydroponics, if we discard and completly replace our solutions regularly (and use a hydroponics nutrient to begin with) deficiencies will become non existant. Occasionally, and I mean occasionally we will need to add a slight amount of Mg, and it should be fractional, but this should be such a rare situation if the other practises are correct.
Ph drift is a great thing, letting it climb to 5.9- 6.1 isnt going to have an adverse effect whatsoever, in fact the inverse is true, the rise will permit correct iron, potassium and phosphorous uptake and prevent the deficiencies that people claim to be experiencing. This is especially the case during flowering, the PH rise will result in slightly more P being absorbed so the constant battle to keep the PH at 5.5 or even lower I think is a little futile.
Oz
I think that summizes the situation very well st0ney, good job with that man!
Id also say that the whole system of nutrients is a delicate balance of +ve and -ve ions, adding a certain element such as Mg usually has the effect of altering the potential with a sudden and drastic availability of the element within solution, the plant uptakes this solution and the problem is further compounded as the plant goes further away from centre...I have read so many growers say "wow the plants have gone really green bafter I added the Epsom Salts" (excess Mg symptoms) then a few days later its "my plant has stopped growing and is starting to yellow in the leaves" (Iron lockout).... as a further example or approach to the overall picture of nutrient solutions think of ph correction....adding ph up (+ve ions) to a solution that you have added too much down ie acid (-ve) to, it shouldnt be done, the whol solution should be dicarded. As it is in DWC, NFT, Dripper,etc etc in hydroponics, if we discard and completly replace our solutions regularly (and use a hydroponics nutrient to begin with) deficiencies will become non existant. Occasionally, and I mean occasionally we will need to add a slight amount of Mg, and it should be fractional, but this should be such a rare situation if the other practises are correct.
Ph drift is a great thing, letting it climb to 5.9- 6.1 isnt going to have an adverse effect whatsoever, in fact the inverse is true, the rise will permit correct iron, potassium and phosphorous uptake and prevent the deficiencies that people claim to be experiencing. This is especially the case during flowering, the PH rise will result in slightly more P being absorbed so the constant battle to keep the PH at 5.5 or even lower I think is a little futile.
Oz
In any event, it appears to be working great so i'm not too beat up about it.
but they fill in at the end.
Just check the label. If your nutes have less then about 2% mg. more will be needed. The PBP line makes you actually buy Cal_Mag for the MG as their base nutes are inadequate. It's not news that PH over 6.1 or under 5.5 causes lockout. Keep your PH at 5.8 if you can . Correct it when it gets above 6.1. Al was a stickler about PH under 6. "5.8" he said over and over again. In fact, he was prolly more strict on PH than most of us are.
