PH down= phosphorus toxicity?
Im trying to figure out a leaf curl problem and talking to my guy at the
hydro store we were going over some possibilities and he mentioned
something about adding phosphoric acid may lead to too much
phosphorus in the solution anyboby hear of this?:hippy:
PH down= phosphorus toxicity?
I've been using phDown (phosphoric acid) for a few years, and have never had a problem. Well, except for a few months ago when I mixed 5 gallons worth in a gallon jug. Kinda pissed-off the ladies, but a quick flush and all was good. :D
Anyway, I have 7.9 to 8.0 ph wellwater and use 1/4 tsp:gallon, bringing my ph down to around 6.7-6.8.
A former troubleshooter in here (stinkyattic) did the math for me a couple of years ago, and at my dilution rate she thought I was fine. She's a chemist familiar with such chemo-numerical mumbo-jumbo.
The thread is around here somewhere...AH HAA...here it is, but don't let the title fool ya:
Humic Acid...
PH down= phosphorus toxicity?
rusty is prety much correct
but for shits and giglles what brand are you using, some organic ph adjusters are different, i used one that needs an assload more than my gen hydro
PH down= phosphorus toxicity?
Mad farmer, I Iguess through the course of a weeks worth of topoffs
I may be using a total of 1 tsp per week and when I topoff I dont add nutes
so I thought the idea was certainly plausable but I know im not using a whole lot of phosphorus to begin with.Thanks guys for the reassurance.:hippy:
PH down= phosphorus toxicity?
Quote:
Originally Posted by phatsesh101
but for shits and giglles what brand are you using...?
General Hydroponics here, too.
PH down= phosphorus toxicity?
Ive used this for three years but I have had this mysterious
leaf curl problem about every other crop and I have yet to
defininatively rule out any cause.:)
PH down= phosphorus toxicity?
Are you watering deep enough to provide moisture to the lower root zone?
Does you medium absorb and hold the moisture, or does it flow right through?
Are the leaves dark or light green? Are the leaves paper thin, or hearty?
What are day/night ambient temps, (room temperature, not under the lights) and what's the room's humidity?
Phosphoric acid is water soluble, and will easily flow-out with the runoff. Doubtful it's the cause. Were you giving too much phosphorus, the ph would crash before any indicators of build-up would occur.
After this I think filling-out the troubleshooting form would be appropriate, along with any pictures you can provide.
PH down= phosphorus toxicity?
mad farmer? new to me, but they do say they use different acids to control phosphorus lockout. never experianced it personally and i use a nice amount of ph down with water reaching 7.8-8 after sitting out over night.
sounds like a ph prob, u should fill out rustys form
i usually curl down when my ph is a lil hi like 6.9 -7 from 6.5 oh yeah disclaimer (this is not a diagnosis)
PH down= phosphorus toxicity?
It also has a lot to do with the source, IMHO.
I guess if you were to add a few cups of bone meal and bat guano to a gallon of soil and adjust your water down with H3PO4, (Orthophosphoric Acid) and use rose food, (10-52-10 N-P-K) you'd experience phosphorous-caused lockout. (among other problems) :thumbsup:
The only acid I really wouldn't get to lower ph is the nitric acid. Not too sure it would work well with flowering.
PH down= phosphorus toxicity?
I filled out the form in my thread here on Aurora Indica Curled leaves
as I am nervously nursing one sick plant after another with this strain.I would appreciate your input if you would check it out.Rusty Ive had a conversation
with you a while back on split ends on my pistils ,well it turns out that plant is rocknrollin and the normal looking plant is the one going south now.
Oh by the way I use DWC .All plants are sharing the same solution but only one affected.:)
PH down= phosphorus toxicity?
PH down= phosphorus toxicity?
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Idont yet know how to quicklink but heres the setup
[attachment=o225156]
[attachment=o225157]
250w HPS 12 in from tops with fan blowing over tops.
Enclosed reflector
Good air supply
6 in net pots of rockwool cubes (Deep Water Culture)
Grown from seed
Tap water adj to 5.8
Check with drops
Adjust with mad farmer Ph down
Ionic bloom 3-2-6
Ionic boost 5-6
I change res when Ive replaced half of the original with topoffs
usally weekly ( she feeding rapidly)I topoff daily at least 11/2 liters usally.
4 tbsp per 6 liters bloom
1/2 tbsp boost per 6 liters
Ph flucuates daily from 5.8 to as high as 7 (sometimes I let it)
and I adjust every morning with the topoff usally incrementally
if I have to make a big adjustment
I never foliar feed
Open 2x6x8 closet
Day temp 82 / night temp 70 Daytime reservoir Temp up to 75
Humidy somewher between 40 - 60 %
not bugs to mention
PH down= phosphorus toxicity?
weve also got ammonium nitrate in mad farmer, I thought that created
byproduct nitrogen or is it the other way around? just wondering:stoned:
PH down= phosphorus toxicity?
My fault, I need to corrct myself,there is no ammonium nitrate in mad farmer.
Imust be reading too much. There is ammonium sulfate.
PH down= phosphorus toxicity?
Your ph fluctuation is causing stress. Keep the ph steady at all costs, or the ladies will continue to suffer. (papery-thin leaves with a washed-out color, sagging leaves that narrow at their crotch and look like an upside-down canoe) Yellowing will deepen and nanners might start appearing if you are not diligent.
Beyond that, a hydro gardener will have to check your schedule and such. (I only do soil)
PH down= phosphorus toxicity?
hey all, ive not posted much or for a while around here(i'm more of a see if i can find the info myself first) but i am stumped with what sounds like a very similar prob.
i use canna aqua,rhizotonic,cannazyme,pk13/14(in bloom).in a gt424 nft tank with 600hps.growing 4 ppp and 2 pakistani valley.
since the last two grows, since changeing nutes from ionic grow,bloom,boost to canna iv'e had nothing but praise for how stable the ph was. BUT...
around a week ago i was doing my daily checks at lights on and my ph had dropped from around 5.6 to 4.9 i adjusted up to 5.7ish useing gt liquid silicone.next day back down around 4.5 and so it continues.the only probs i can see on my girls are some rusty patches apearing on some lower leaves and the leaf curl as described earlier.another thing i would add is the girls really started feeding faster around the same time.there steady now at 1200ppm,tds from 600 less than a week ago.
from reading around the only thing i can find is possible root rot but my roots are looking better than usual (nice bright white looking healthy).
sorry for the long post but i am STUMPED as i said. so ANY ideas at all would be really appreciated, thanks in advance and good luck yourselves
PH down= phosphorus toxicity?
Ive had to make a late adjustment to solution to keep it
steady throuout the night .Is doing better after a week of this,as a matter of fact is spurting right now and looking very nice.I have always allowed my ph to flux,have always acknowledged this as a byproduct of a healthy feeding plant . Perhaps 1.2 is a bit much in this case.thanks for the input all.:hippy:
PH down= phosphorus toxicity?
Ive had that problem with soil and suddenlydropping ph.I lost a real nice afgan
to that.the only thing I could figure out as the cause was a lack of a good buffering agent.My ph tanked and actually got hotter as i flushed,that sounds
alot like your problem,the signs are seemmingly apparent with any kind of ph problem high or low ph if you have this type of leaf curl you more than likely always have a ph prob,which as in my case with the afgan alot went wrong
real fast when I couldnt raise it fast enough.Ibabbleatimes:stoned:
PH down= phosphorus toxicity?
Johnny: you might want to consider starting your own thread, and filling-out the troubleshooting form. (the link is in my signature) Might be water problems, might be medium, might be additives or dilution rates or perhaps something you're spraying...hard to tell without specifics, and a picture would help if possible.
PH down= phosphorus toxicity?
thanks rusty, i think i have cracked it(fingers crossed) i added some h2o2 today adjusted ph 30 mins later and it has remained stable since.i think i will run it daily then flush and go back to basics and see what happens.:hippy:
PH down= phosphorus toxicity?
just a quick one, well things are holding nicely with the h2o2.maybe i had some sort of mold,mildew problem,strange cos my roots look the best they have ever looked at this stage lol.