over fert with low ec?!?!?

so i have some silver pearl in week four of flower.

2000 watts
dehumidifier with humidity at 45
temp controle with a range of 70-75
water chiller 69.f
ph 6.0
ec .59


so no matter what i adjust my plants to they seem like they are burning. my ppm/ec wont go down either so i feel like my plants are not eating but some how being over fertilized. here are the stages of what the leafs are doing regrdless of what i try.

When was the last time you calibrated your PH pen?

Those pictures look very much like a phosphorous deficiency in flowering. In hydro grows, phosphorous starts to get locked out at pH 6.0 and higher. Even if you are giving them phosphorous, if the pH is too high they won't be able to absorb it.

cruzer101 said:

When was the last time you calibrated your PH pen?

Click to expand...

i just did and its brand new. i also have a calibration check button that i check regularly. assuming this is the issue what is a ec i can set that there is no was it will burn. and if my plants are eating why is my ppm/ec so steady? i really need help!

As well you may need to flush your medium. I had similar problems the first time I used rockwool.

If the PH is not off, Water temp is between 65 and 75° there is plenty of air for co2 in there then it has to be the nutrient soulition.
I would back off. Flush with r/o for 24 hrs. Get some calmag, start back with nutes at half strength with calmag.

As far as PH and nutrients are concerned I found this chart helpful.

cruzer101 said:

If the PH is not off, Water temp is between 65 and 75° there is plenty of air for co2 in there then it has to be the nutrient soulition.
I would back off. Flush with r/o for 24 hrs. Get some calmag, start back with nutes at half strength with calmag.

As far as PH and nutrients are concerned I found this chart helpful.

Click to expand...

this is my main problem. in my head i bounce between over fert or under fert. and eveyones advice is the same. and if im wrong my plants will die.

im going to hope its an under fert and bump it up so somehthings kinda safe. if it is nutrient burn my plants will die from me doing this. and it probably is nutrient burn because my ec wont drop and that means my plants are not eating


my plants however have been on a pretty low ec .4 and not gotten better. i also think i see purple spots starting to form in the bud leafs.

ill report back with new ec and ph.

positive rep to whoever is right by the ways so take your guesses

Its nice to offer but I dont really care about the rep.
Just thought I would let you know I had a similar problem and a flush, then start back at half strenght with calmag cleared it up. Good luck.

oregongreenerthanyouthink said:

this is my main problem. in my head i bounce between over fert or under fert. and eveyones advice is the same. and if im wrong my plants will die.

im going to hope its an under fert and bump it up so somehthings kinda safe. if it is nutrient burn my plants will die from me doing this. and it probably is nutrient burn because my ec wont drop and that means my plants are not eating


my plants however have been on a pretty low ec .4 and not gotten better. i also think i see purple spots starting to form in the bud leafs.

ill report back with new ec and ph.

positive rep to whoever is right by the ways so take your guesses

Click to expand...

Well, here is a picture of phosphorous deficiency in flowering:


(pic from "The Complete Guide to Sick Plants - http://www.icmag.com/ic/showthread.php?t=11688)
That looks almost exactly like the 3 leaves that you posted up. Also since you are feeding them it seems like they are just not able to absorb it.

That's why I suggested a pH issue, but it sounds like cruzer101 definitely knows more about growing hydro than I do, so I would try what he said and try to get your pH to 5.8. This is another chart about the nutrients, you want to use the bottom chart for hydro grows, the top is for soil.



Hope this helps!

cruzer101 said:

Its nice to offer but I dont really care about the rep.
Just thought I would let you know I had a similar problem and a flush, then start back at half strenght with calmag cleared it up. Good luck.

Click to expand...

I will have to agree with cruzer. I would recommend clearex as a flushing agent also. BTW when was the last time you did a complete res swap? If you haven't recently what could be going on is although your ec is low you could have a super high buildup of one or more nutrients causing lockout of others.

are u using 1 part nutrients ? you could have some sort of lockout , the reason they have 2 part nutrients is because 1 part nutes get lockout heaps! the chemicals have to be seperated hence the name. i got lockout from a 1 part veg nutrient brand and lost my hole crop, the plants started going spotty then died off.

smallclosetgrowr said:

are u using 1 part nutrients ? you could have some sort of lockout , the reason they have 2 part nutrients is because 1 part nutes get lockout heaps! the chemicals have to be seperated hence the name. i got lockout from a 1 part veg nutrient brand and lost my hole crop, the plants started going spotty then died off.

Click to expand...

i was running the entire house and garden line. its like 7 parts. now i am running supernatural and not the entie line just the grow aqua and bloom aqua.

i am testing the idea that plant food is plant food and yeilds will be the same. i dont think this expiriment will really count as far as yeild comparison because of this deff/ over fert. but i have learned that when you buy expensive nutrients you are buying a more ph stable product. atleast in my wimsical study

Okay so here is what I have been dealing with the last few days
I changed out the rez and buckets and everything and bumped it back up to a normal feeding secdual.

I have not a clue as to how I will know if this is going to fix my problem. Because the damage that has been done will not disappear (dead leaf) and just about every leaf has a little bit of burn on it. If a new mark appeared on a leaf today I would probably assume it was already there.

May-1(am)
Ph 6.0
e.c. .97
Ppm 692

May-2 (am)
Ph 5.7
Ec 1.01
Ppm 714

Adjusted ph

May-2(pm)
Ph 6.2
Ec 1.04
Ppm 745

May-3 (am)
Ph 5.5
Ec 1.07
Ppm 761

Adjusted ph

May-3(3:00pm)
Ph 6.3
Ec 1.12
Ppm 801


So what is the plan guys........ Do these numbers mean my plants are not eating the nutrients?

How can I tell if I’ve fixed my problems.

I’m so frustrated with my plants right now I’m about to just top my reservoir off with water and let them just have the nutrients in the buckets and the water in the rez for the last month of their life. Grows like a fucking weed my ass

bumbpppppppppppppp

ph 5.5 ec still climbing.

any ideas? anyone know anything that could help?

would more pictures make people talk. i feel like i cant give any more exact information than a day to day ph and ppm update

More pics might help get people to respond. I'm sorry, I've never done hydro so I don't know what you need to do.