getting fancy with PH tweaking...

[keepleft]

"If you want to get real fancy, you can tweak the pH of your solution to allow more nitrogen in the growth phases and then readjust during the bloom phase for more phosphorous uptake."

 

anyone know what the optimum ph is in the grow and bloom phases???? ive always run 5.8 to 6.0 in rockwool. but ive heard that there is a optimum level for each stage - as per above. just cant find what it is!

[dsyfer]

Well if we look at the chart we can see that you get phosphorus abouve 5.8 in hydro, nitrogen runs from 5.5 - 9, so you could probably bump up in flower and still not lose nitrogen, but then you lose Manganese and Calcium?

 

[Frazz]

heya, pretty charts informative too....did you make them?

 

thnx :smoke

[dsyfer]

heya, pretty charts informative too....did you make them?

 

thnx  :smoke

<{POST_SNAPBACK}>

Nah it has been bouncing around here and OG for a while now

[Roadblock]

I monitor what way my tank is moving , if PH raises I will set it up at about 5.5 and let it drift to 6.8 tops before adjusting , this drift generally works out over a week and as I dump weekly I usually dont need to adjust it at all after its first set up , so I guess Im covering the whole range mull likes over the week , if I had to have an ideal it would be 5.8 but I dont like a constant ph and like to let it drift within my range , works for me .

 

Rod

[keepleft]

thanks guys

 

after taking readings from both the nute and rockwool i find that there never exactly the same. i guess the plant taking up nutes would impact the ph level in the medium

 

i find that the ph of the medium (rockwool) can be a few points above the tank (eg tank 5.8 = medium b/w 5.9 to 6.1). so i do the same as rod essentially - adjust tank to 5.5 and let it drift to 6.1 - 6.2 before re adjusting down.

 

i find the ph drift can quite rapid though (2 days)

Edited February 19, 2006 by keepleft

[Roadblock]

(((( i find the ph drift can quite rapid though (2 days) )))))

 

Even faster if your tank is on the smallish side and or your plants are large and powering , when its like that things can happen very quickly , I like a good size tank for its buffering , you will also find that ph varies not only in the slab vs tank but in different areas of the slab another reason I like flow in Rockwool , commercial growers stay within a pt either side of plant ideal and dont have any problems with that .

 

Rod

[nitram]

Grow by tweeking ya PH

 

In theory perhaps, but they stll only have accounted for about 1/2 of what the in plants dose.

 

In practice you need "total enviroment control" of the likes of temps of room, res, / humidity, nute mixing, ......... a 24 hr monitoring system. :smoke

[F420]

I try to run 5.3 or just over in flower and 5.8 to 6.3 in veg.

Your better off letting it swing than trying to adjust it all the time.

And then flush at least every 2 weeks.

[keepleft]

ferengi why so low in flower? 5.3!

 

also why are u better off letting it drift than adjust?