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Thread: Is is calcium deficiency?

  1. #1

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    Default Is is calcium deficiency?

    Hello ! Hope you guys alright and you're having a good day!
    I have 3.2 x 3.2 grow tent
    HLG 550 RSPEC light (I've decreased power to 330W)
    Willma hydroponics - 4 x 18l - using clay pebbles + rockwool as grow medium. I put drippers in the corner of the rockwool cube, so they can water cube as well (don't know that is a good idea, but plants doesn't looks like overwatered)

    I using canna aqua set. I have 30l water and Canna Aqua A + B, Cannazym, Rhizotonic at the moment - I've dose exactly how canna uk calculator is saying.
    I keep PH 5.5 till yesterday, today I increased it for 6.0. Seems PH going up itself everyday for around 0.2 and I have to use PH down to decrease it, which is alright I think as plants feeding.
    Yesterday I start running water pumps for 2min every 2h before that was 10min / 1 hour

    Temp I running 26-28 C (I would have 24-26 C, but guy from who I bought light recommend me to run a bit more temp)
    Humidity - 60-70% (Today I forgot change water in humidifier and was really low for a bit - therefore could be around 35 in picture, but it was only today for 1-1.5 h)
    EC - 1.2

    And 4 lovely girls: Pinneapple Chunk, Cookies Kush, Morning Glory, Blueberry OG
    All controlled by my raspberry pi bot

    Today is 14 day and yesterday I spot something wrong happens with Pineapple Chunk leafs - they have a brown spots. I suspect that is a calcium deficiency which was caused by low ph I had before ? Do you think increase it will help ? - if no do you recommend me to add some cal-mag into water reservoir together with nutrients? I also have a feeling that the plants could go up better a bit and maybe they missing something too ? ;-)
    What do you guys think? In attached photo there is a whole in the leaf - it is something I made by mistake.


    Thank you very much in advance for all advices. Have a great evening!


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    Last edited by JimmyG; 19-11-19 at 09:54 PM.

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  3. #2

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    Mate

    They look hungry but I could be wrong, I’ve been growing in a Wilma for a couple of years now and I reckon you should up the ec a little. On the mag issues give them a spray see how it goes.

    Good luck

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    Cut those nutes way down pal .

    1.2 way too high . .6-.7 should be plenty

    Ph 5.7

    Give em a calmag foliar once a week too

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    Quote Originally Posted by WWBB View Post
    Mate

    They look hungry but I could be wrong, I’ve been growing in a Wilma for a couple of years now and I reckon you should up the ec a little. On the mag issues give them a spray see how it goes.

    Good luck
    Thanks mate, Actually I found on canna nutrient table that Total EC should be 1.5 - however I thought the 1.5 is maximum level of EC I should have, no that I should have 1.5 in total. I will add more nutrients. What do you think about adding the calmag to nutrients?

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    Quote Originally Posted by Trex View Post
    Cut those nutes way down pal .

    1.2 way too high . .6-.7 should be plenty

    Ph 5.7

    Give em a calmag foliar once a week too
    Thank you sir for your answer. I will have 5.7 PH now.

    Can I add cal-mag directly to other nutrients? It will also increase EC as I suspect ?

    I wondering why you asking me to have EC 0.6-0.7 as my water actually has 0.4 - I wouldn't be able to add to much nutrients to it anyway ? I also found that nutrient producer saying that total EC could be 1.5, so i think i can have 1.2 and probably i could increase it? What do you think?

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    Hello, so just for update:

    I make PH 5.7 in reservoir
    I've bought Magne-Cal from Plant-Magic and put 25ml to reservoir
    Now EC is 1.5

    Will see what will happens with plans in next couple of days. Thanks you guys for advance.

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    Quote Originally Posted by JimmyG View Post
    Hello, so just for update:

    I make PH 5.7 in reservoir
    I've bought Magne-Cal from Plant-Magic and put 25ml to reservoir
    Now EC is 1.5

    Will see what will happens with plans in next couple of days. Thanks you guys for advance.
    Off to a nice start.
    With most nute lines, calmag needs to be added first unless using silica then silica first followed by calmag then the rest. Something to do with how they mix. Adding calmag to an existing soup can prevent it from mixing properly.
    Nute suppliers tend to overstate the required EC to get you to use more of the product. At this stage 0.6 is what you want. With a background of 0.4 your aim is 1.0
    Have you looked up a water report for your locality? At 0.4 you might already have all the calcium and magnesium that you need. It helps to know what you are starting with.

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    Quote Originally Posted by CityDweller View Post
    Off to a nice start.
    With most nute lines, calmag needs to be added first unless using silica then silica first followed by calmag then the rest. Something to do with how they mix. Adding calmag to an existing soup can prevent it from mixing properly.
    Nute suppliers tend to overstate the required EC to get you to use more of the product. At this stage 0.6 is what you want. With a background of 0.4 your aim is 1.0
    Have you looked up a water report for your locality? At 0.4 you might already have all the calcium and magnesium that you need. It helps to know what you are starting with.
    Thanks for your reply.
    Cheers, for letting me know. Looks like now I need to change whole reservoir and do that again ;-) - as I add calmag to existing soup . I will try add less nutrients now to achieve 1 EC.
    I basically buying water in shop in bottles , it has following details:
    PH 7.4, Calcium < 55mg / litre , Magnesium < 16mg Litre, It has some other stuff too, don't know is worth to mention..
    Do you think is still worth add Cal-MAg? I've adding Canna Aqua A, which has some Cal and Mag as well.

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    So,
    what I did is:
    I've reduced EC to 1.0 - I've add 12-5l of water more, I stir and then reduced 10l from reservoir.
    PH 5.7

    I didn't change whole thing yet, will wait 24h and see if there is improvement if no I will replace whole thing and add calmag first as you suggest - or maybe it won't be necessary ?

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    Quote Originally Posted by JimmyG View Post
    Thanks for your reply.
    Cheers, for letting me know. Looks like now I need to change whole reservoir and do that again ;-) - as I add calmag to existing soup . I will try add less nutrients now to achieve 1 EC.
    I basically buying water in shop in bottles , it has following details:
    PH 7.4, Calcium < 55mg / litre , Magnesium < 16mg Litre, It has some other stuff too, don't know is worth to mention..
    Do you think is still worth add Cal-MAg? I've adding Canna Aqua A, which has some Cal and Mag as well.
    You should have enough calmag. I would leave it out and watch the plants. Mag and cal deficiency are easy to spot most of the time.

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    Quote Originally Posted by CityDweller View Post
    You should have enough calmag. I would leave it out and watch the plants. Mag and cal deficiency are easy to spot most of the time.
    No worries - thanks

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    Hi,
    Seems things get worst, I see something similar in other leaf too.
    I've changed whole water in reservoir. I've added just a Canna nutrients (Aqua A + B, Cannanzym, Rhiozotonic) - 75% of that what producer said and now there i EC - 1 and PH 5.7.
    I didn't add Cal-Mag as it will increase the EC. If calcium deficiency will keep going i will order cal-mag spray and use it.
    What should I do if EC go up now in next couple of days? Just add more water or there is something like EC down which I can use (IMHO never seen that before) ?

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    Quote Originally Posted by JimmyG View Post
    Hi,
    Seems things get worst, I see something similar in other leaf too.
    I've changed whole water in reservoir. I've added just a Canna nutrients (Aqua A + B, Cannanzym, Rhiozotonic) - 75% of that what producer said and now there i EC - 1 and PH 5.7.
    I didn't add Cal-Mag as it will increase the EC. If calcium deficiency will keep going i will order cal-mag spray and use it.
    What should I do if EC go up now in next couple of days? Just add more water or there is something like EC down which I can use (IMHO never seen that before) ?
    If you have plant magic cal mag then make that up as a foliar and spray it. Put a drop of dish soap in with it to stick better to 1 litre water and whatever it says for foliar use on the bottle.
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    You are over feeding, plain & simple.

    Ignore charts, they were not written for your plant, more likely a vegetable crop
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    An easy way to work your ec is start at 0.8 if your water is 0.4 , and keep it at that until the ec in the Rez drops then up it by 0.1 , take no notice of charts and work with what your plant is telling you, multi strains can be a problem as some strains are hungrier than others , your Rez won’t change much with plants that size so keep on low side of ec

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    The issues with your leaves are caused by fluctuations in your pH. Your pH fluctuates when you have the improper nutrient levels. I agree with those that tell you to lower your EC a bit and see how things go. Don't bother putting extra calmag in at this time. just get your EC squared away so your pH stays more stable and go from there.

    Sent from my SM-G975U using Tapatalk

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    Just read this which makes me want to take back my previous advice. My take away from the article that I cannot link is ... filter your water properly and control what you put in it.

    "The particular forms of calcium and magnesium that are contained in municipal water are often the large-molecule variety—and large molecules cannot fit into the small pores on plant roots."

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    Quote Originally Posted by jingo View Post
    The issues with your leaves are caused by fluctuations in your pH. Your pH fluctuates when you have the improper nutrient levels. I agree with those that tell you to lower your EC a bit and see how things go. Don't bother putting extra calmag in at this time. just get your EC squared away so your pH stays more stable and go from there.

    Sent from my SM-G975U using Tapatalk
    Those clay pebbles are bad for ph fluctuations if you don’t clean them properly

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