Possible Nutrient Deficiency?

[LumpyStatus]

Hey fellas,

Having yet another problem...

Strain: Sour Diesel
Age: 2 Weeks (veg) from clone
Mix: Sunshine mix #4
Nutrients: Lucas formula flora nova @ 3ml/gal EVERY watering
PH: 5.8 to 6.3

Having a problem that I have just noticed this morning. The leaves have some rusty colored spots on them... Check out the pics. I have had a few deformed leaves on some of the plants that have curled different directions, but nothing really major... This was new to me this morning and I don't know what it is... I don't think it is from the light being too close because it isn't the TOP leaves... Any help would be appreciated. Check out the pics below.

[LumpyStatus]

Forgot to add image of all the plants...

[c-ray]

if you run distilled watered through the soil of one of the affected plants what pH does it say???....looks like potentially a magnesium deficiency or perhaps some nutrient got spilled on those leaves

[LumpyStatus]

Thanks for your reply. I have some distilled sitting at home and when I get off today, I will head over there and see what the PH is of the distilled runoff. How much should I use? The plants are in 2 gallon pots and already in need of water today (they are fairly dry at the moment)...

So I am watering with X amount of distilled water and catching the runoff to test the PH correct?

[The Cannarchist]

Calculate the ph with 25% excess run off through the pots.

report back

[LumpyStatus]

Hey there buddy, thank you for your previous help with my res...

I went ahead and did the distilled water flush earlier the distilled water had a starting PH of around 6.0-6.2 and here are the results:

Runoff tested
PH: 5.5
TDS: OVER 2000ppm, it just blinks at 2000 which I guess means that it is actually a lot higher than 2000ppm which is not good. I am assuming that I have TOO much nutes and my plants are starting to burn. Correct me if I am wrong, but I think that is it.

One problem I have is that I don't know for sure if my Hanna PH/EC/TDS meter is correctly calibrated. I have GH 1500ppm solution @25c. When I calibrated I did this using the TDS type at 0.5 conversion with. I don't know if this is correct because the GH 1500 ppm is on the NaCl scale I don't know what this means. How do I correctly calibrate my meter? Should I use .5 or .7? If anyone has experience with the black hanna meter that does PH/EC/TDS and temp, let me know...

Anyways, I am assuming a good flush is in order, but I will wait for a response from you guys to let me know if my assumtion is correct. A couple more pics added showing some leaf tip burn as well.

[The Cannarchist]

Pour your tap water through each pot 4 gals per pot(Ie: twice each pots volume)

And then let it dry and do the same again.

Peatmix is NOT hydro.

Less is more

[nuggdigger]

suggestion: if you don't know your ppm conversion for your meter, and it reads EC, take the EC reading and convert it to the ppm you want to use. Simply multipy your EC by 500 for .5 conversion and 700 for .7 conversion factor to ppm.
It seems to me if your meter can't read your ppm, then it would be to high for sure.
maybe this link has some info and pdfs to help you with your meter.
http://www.bghydro.com/BGH/Itemdesc.asp?ic=TEMCOHAP&eq=&Tp=

peace:pipe:

[The Cannarchist]

Sorry Nug...(I usually tug my forelock to you)....But over 2000ppm in anyones books is a "friday Fry" night(mare)

just pour the water through it Lumpy.Start afresh.

Less IS more in all forms of organic substrate.Peatmoss included.

The plant will tell you when she is happy.Full 45 degree angle leaves..
looking for the light....

Start with less Lumpy..Then increase and find the Zone for your individual plants.

[The Cannarchist]

First picture.......

it is not the spots of overfert we are looking at......

we are looking at the canoe shaped leaf ,above and to the left.

[nuggdigger]

lol..i never intended to be disagreeable..It seems to me if your meter can't read your ppm, then it would be to high for sure.


if his meter maxes out at 2000 ppm i doubt that it would be a .7 factor, i had this hunch from the start is was .5 really. 2000ppm @ .5 factor would give you ec of what 4? :eek:
This is a classic case of toxic nute accumulation, the solution....with no offence to the antiflush, is as Cannarchist stated.
As i was told..take a full glass of water...make it 500 ppm with NaCl or nute sol etc, set it on window sill or if in a hurry, the stove..lol..till it is only half full. What do you suppose the ppm of the water is now? Cannarchist has nailed it on the head. I was trying to make him and his meter better mates..lol.

peace:pimp:

[LumpyStatus]

Thanks for the response fellas... I appreciate it...

You said:

"First picture.......

it is not the spots of overfert we are looking at......

we are looking at the canoe shaped leaf ,above and to the left."



I just wanted to make sure that you meant I DO have nute burn and that is what the spots/burnt tips. I DO have nute burn right?

You are saying the canoe shaped leaf is a different problem caused by what? Or is it all from nute burn?

I already did the first flush... I will let them dry out and flush again. Thanks for the info and link on the ppm meter nug... That meter in the link you showed is the EXACT meter I have. It does ppm/ec at .5 or .7 as well as ph and temp. Just don't know if I have ec calibrated correctly. I have the 1500ppm NaCl solution, however do I calibrate it at .5 or .7 conversion? Or should I just use EC calibration and skip the TDS calibration? I can calibrate in µS/cm or in ppm. Does it matter which I do?

Anyways, my leafs are definatley growing at a 45 degree angle, but only the NEW growth does, some of it is actually standing up vertically (the real new stuff). They are growing really well. So is there anything I should do other than what you all have said already?

What should my run off ppm/EC actually be? I read that using 1/3 strength lucas formula floranova every watering was good for dense mediums, is this not the case with sunshine mix? How often should I check my runoff and what ph/ec range should it stay within?

Sorry for all the Q's :)

[LumpyStatus]

Thought I would add that I ended up calibrating my EC meter with 1413 µS/cm solution. It looks like the water I took from the run off earlier was indeed EXTREMELY high weighing in at a whopping 3999+ EC the + is because my meter only goes between 0 and 3999 µS/cm.

:)

So I made a HUGE mistake and am going to have to keep an eye on things a little better here. What should my runoff EC be? Should I be flushing my plants on a regular basis or should I simply adj the nutes to a level where I can add them every watering?

I appreciate all the help you guys have given me... Oh, and I am still wondering about those "canoe" shaped leaves when you get the chance

[nuggdigger]

hmm...canoe shaped leaves....my guess goes to magnesium deficiency.

Toxicity causes deficiency.

Your runoff EC is what your media EC was at. In other words...you want your runoff to be close to your target EC. Flush your plants till your runoff is below the target EC, then make a fresh batch of nutes to target EC and water the plants to reset the media to desired EC. Remember that as your plants transpire, and water evaporates from your media..the EC will again concentrate.

peace:pipe:

[The Cannarchist]

What he^^^^said.

[LumpyStatus]

Thanks fellas... I really appreciate it. I am just letting the first flush dry and I will flush again then readjust the nutes :)

A couple more questions if you will... When I get my ebb n flow set back up, is it possible if I use a RO filter that all my problems with the cloudy water will be solved? Topic: https://www.cannabis-world.org/cw/showthread.php?t=4062

If I use RO water with the lucas formula with ebb n flow system with clones straight in hydroton, should I be ok to just leave the res sitting there with nutes in it and have no problems? Or should I always keep airstones and pump air into the res 24/7. I would really like to be able to use no air pump with my ebb n flow res if possible. Or will this cause the cloudy water to come back? Is the cloudy water being caused specifically because my tap water is 260ppm and 8.1ph? Or do you think it is something else?

[LumpyStatus]

Any ideas?

Also, can someone please suggest a RO filter brand/type...