Checked runoff ppm. Too high

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TrichomeChaser

Well-Known Member
What's up folks, ive got a couple MOB clones in 5gallon air pots. Mini rockwool cubes as my medium. I've been watering every day to every other day depending on how light the pots are getting and how they look. Plan to automate everything on drip rings once I have got this straightened out. I have been setting my ph to around 6 and ppm to 700 every watering but I tested my runoff last night and it was actually higher then what I put. It was just over 7 going in and came out at 900. Previously I have been doing a slow hand water which I'm thinking maybe what caused this. Watering so slow that the plant is taking in to much of the nutrients rather then just taking what it needs. Would a faster watering prevent this in the future? That way it would get the nutrients it needs and flush out any buildup. My next and most important question now is what should I do to get that PPM back to where it needs to be? Should I give a good watering with just plain water, no nutrients to flush out some of that build up? These girls just went into flower so some advice would be great so I can get them off to a strong start in flower.
Thanks
 
whitebb2727

whitebb2727

Well-Known Member
Unless plants are having problem ignore it.

Runoff pH and ppm will most likely not be accurate due to things in the soil.

As long as you are getting good run off when you water to avoid salt build up you should be OK.
 
T

TrichomeChaser

Well-Known Member
a senile fungus said:
Are you having any problems with the plants? What made you check runoff?
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Unfortunately I am having some issues. The leafs being affected are very sprodic. It'll show on new growth and oldest. One plant it affected a whole lower branch and could barely see any problem else where. I couldnt find a deficiency it looked like so I'm thinking the problem is in the medium. My ph run off comes out just over or under 6 which seems good so I'm thinking it must be some sort of nutrient buildup or something.
whitebb2727 said:
Unless plants are having problem ignore it.

Runoff pH and ppm will most likely not be accurate due to things in the soil.

As long as you are getting good run off when you water to avoid salt build up you should be OK.
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I am getting some problems I've noticed. And I am in pots of mini rockwool cubes not soil.

If you guys think it could be a deficiency or something other then what I am saying it could be. Please feel free to tell me I'm wrong.
 

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Creature1969

Creature1969

Well-Known Member
I have a plant doing the same thing. No idea whats going on. Mine is in coco/hot soil and I shouldnt be having any issues. 3 other plants same age same strain same feeding schedule look spectacular.
 
Tupapa

Tupapa

Well-Known Member
TrichomeChaser said:
Unfortunately I am having some issues. The leafs being affected are very sprodic. It'll show on new growth and oldest. One plant it affected a whole lower branch and could barely see any problem else where. I couldnt find a deficiency it looked like so I'm thinking the problem is in the medium. My ph run off comes out just over or under 6 which seems good so I'm thinking it must be some sort of nutrient buildup or something.


I am getting some problems I've noticed. And I am in pots of mini rockwool cubes not soil.

If you guys think it could be a deficiency or something other then what I am saying it could be. Please feel free to tell me I'm wrong.
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Looks overall good to me., Maybe u need to supply some calmag and micros. Other than that they look good
 
T

TrichomeChaser

Well-Known Member
Tupapa said:
Looks overall good to me., Maybe u need to supply some calmag and micros. Other than that they look good
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Thanks. I am actually using General Hydroponics full lineup. And I use RO water so I add four milliliters per gallon of calimagic. Overall the plants look very healthy but that one branch that you can see has the holes in the leaf became like that pretty quickly so I don't want to see that happened to the rest of the plant. I'm just having a hard time narrowing down what the cause is and I don't want to make any big adjustments that don't need to be made.
 
im4satori

im4satori

Well-Known Member
he is not a soil grower
he is using rockwool as his medium

checking run off is always a good idea in RW medium
its how you know whats going on
it doesn't work in soil but its the holy grail in hydro

5 gallon buckets of rockwool that's huge
are you planning to veg for 6 months lol

you could easily drop down to a 1 gallon container
only reason to give them that much space is if you plan to keep them in veg for extended periods as a mother

your plants look great btw

the difference in ppm between your feed and run of is not off much and not to be over concerned with

you need to watch to make sure your putting enough solution thru a pot that size so water it for long periods of time infrequently
the run ppm could be high if your not getting enough new solution thru to wash out the old

two things could be

either you need to lower your ppm slightly
or
you need to put more volume thru each watering


the lower leaf issue and the upper growth issue are 2 separate things
both very minor

the top growth showing yellow is an issue with iron
you either don't have enough or something is blocking its uptake (commonly too much P)

the GH 3part mix
per gallon

full strength bloom guess (EC 1.0 / PPM 800)
6 mls grow
3 mls micro
6mls bloom
3mls calmag

full strength veg guess (EC 1.2 / PPM 950)
7.5 mls grow
5 mls micro
2.5 mls bloom
2mls calmag
1/4 tsp Epsom salt


this mix is balanced and considered a safe low EC/PPM

run the veg nutes until one or two weeks into 12/12

if you need a slightly higher EC/PPM mix it the same way but with slightly less water
if you need a slightly lower EC/PPM mix it the same way but with slightly more water
 
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im4satori

im4satori

Well-Known Member
theres no need to do any flushing or anything like that

your doing great and the waste tells us your very close to perfection

adjust your next nutrient mix to match what i recommended
 
T

TrichomeChaser

Well-Known Member
im4satori said:
he is not a soil grower
he is using rockwool as his medium

checking run off is always a good idea in RW medium
its how you know whats going on
it doesn't work in soil but its the holy grail in hydro

5 gallon buckets of rockwool that's huge
are you planning to veg for 6 months lol

you could easily drop down to a 1 gallon container
only reason to give them that much space is if you plan to keep them in veg for extended periods as a mother

your plants look great btw

the difference in ppm between your feed and run of is not off much and not to be over concerned with

you need to watch to make sure your putting enough solution thru a pot that size so water it for long periods of time infrequently
the run ppm could be high if your not getting enough new solution thru to wash out the old

two things could be

either you need to lower your ppm slightly
or
you need to put more volume thru each watering


the lower leaf issue and the upper growth issue are 2 separate things
both very minor

the top growth showing yellow is an issue with iron
you either don't have enough or something is blocking its uptake (commonly too much P)

the GH 3part mix
per gallon

full strength bloom guess (EC 1.0 / PPM 800)
6 mls grow
3 mls micro
6mls bloom
3mls calmag

full strength veg guess (EC 1.2 / PPM 950)
7.5 mls grow
5 mls micro
2.5 mls bloom
2mls calmag
1/4 tsp Epsom salt


this mix is balanced and considered a safe low EC/PPM

run the veg nutes until one or two weeks into 12/12

if you need a slightly higher EC/PPM mix it the same way but with slightly less water
if you need a slightly lower EC/PPM mix it the same way but with slightly more water
Click to expand...
Thanks for detailed reply, I had them in 3 gallons vegging for month and half and the roots were wrapped around the bottom like crazy so I transplanted all week before flowering. I also use the GH additives so would that change the nutrient recipe you gave me? I have been using the captain Style feeding schedule at 700 ppm
 
im4satori

im4satori

Well-Known Member
what additives?

the enzyme wont change anything

kelp might slightly

you don't need the kool bloom its just costing you money
 
im4satori

im4satori

Well-Known Member
if you want to use the kool bloom
i can give you the formula for it but it produces about the same recipe either way..maybe just a little more P that's not needed

not having to use it will save you money and the formula without it is actually better
 
im4satori

im4satori

Well-Known Member
the formula is a safe low EC/PPM

with pots that size and more infrequent waterings i wouldn't be surprised if its a little weak for you

but start there and if you get issues bump up the PPM 10%... depending on what your run off samples test at
 
im4satori

im4satori

Well-Known Member
hydro doesn't have the same rules as soil and root bound issues

i can grow 4ft trees in a 6" block
i just have to water more frequently
but its easier to replace the water volume in the medium with a smaller pot
 
T

TrichomeChaser

Well-Known Member
im4satori said:
hydro doesn't have the same rules as soil and root bound issues

i can grow 4ft trees in a 6" block
i just have to water more frequently
but its easier to replace the water volume in the medium with a smaller pot
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I figured the amount of Roots at the bottom would be out of control if I didn't transplant to something bigger before flowering. So because my pots are so big do you think I should be giving big amounts of water at each watering and only watering once every 2 or 3 days since its going to hold more water or what would be my best route to take since I am already in these big pots.
 
zzerg85

zzerg85

Member
Use recharge or TNC myco hydro.
Beneficial bacteria helps your roots to uptake nutes . If it's a deficiency this what you might need

Plants look great just like on captains pictures

How many plants are there?4?
How big is your area?
The 5 gallon pot is fine I think.
 
T

TrichomeChaser

Well-Known Member
Tha make
zzerg85 said:
Use recharge or TNC myco hydro.
Beneficial bacteria helps your roots to uptake nutes . If it's a deficiency this what you might need

Plants look great just like on captains pictures

How many plants are there?4?
How big is your area?
The 5 gallon pot is fine I think.
Click to expand...
Thanks for info, I've been looking at recharge, I actually ended up getting rid of two because they were getting so big I only had room to flower two with the other ones I already had flowering. I got my ph and everything dialed in perfect and they are growing great now, in week 4 of flower. I did have four total. My flowering room is 8x8 and I have 3 600w hps but I had two big ones already flowering so l was out of space
 

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goldberg71b

Well-Known Member
Where does this idea keep coming from? There is absolutely no value to testing run off. The only area that matters is the root zone. This myth needs to be busted!
 
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