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Thread: EC, ph & water levels. What they tell you and how to react.

  1. #41

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    Everyday without fail if I can't the missus will things can change so quick I wouldn't risk it and it takes a minute and on average they need a top up anyway later on,
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    Redz
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    Dwc in a nutshell

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  5. #43

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    Guys… if people are still reading this thread, here’s what’s really confusing me. I have hard water, EC 0.6.

    Now, my understanding is that EC itself is simply a way of measuring the amount of nutrients in the water – nitrogen, potassium, phosphorus etc. The more of them you add, the higher the EC. OK.

    But my confusion comes from advice on various forums and guides telling me that I have to include the natural EC of my water in the total.

    Now I think that means, if I want an EC of 1.8, I’m already starting from 0.6, so I just need to add enough nutrients (Canna Vega at this stage) to give it an extra 1.2.

    That’s simple enough, except… the 0.6 of the water is caused by different salts (mostly calcium and magnesium, I think) from the ones in the Canna Vega, eg NPK, which the plant needs to grow. So if I only add 1.2 of Canna Vega to achieve a total EC of 1.8, the composition of my growth medium will be very different than if I’d started off with (say) distilled water, and added a lot more Canna Vega to bring it up to the 1.8.

    What am I missing please?
    Thanks

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  7. #44

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    Your not missing anything mate, try not to overthink it.
    Just go by the ec on whatever water you will be using and you are going to start feeding at a certain amount and up it as needed. Just worry about the water you are using.
    If your going to use RO or distilled it's a different story all together because there's a lot more to it than the calcium and magnesium there's lots of trace elements.

    Your background is not far off mine 0.7 and I also use vega and all seems to be great
    Atb

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  9. #45

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    Sadly, being a touch OCD, not over-thinking is not an option with me, so what I try to do is at least make the excessive analysis bear fruit! OK, so whatever my water starts off at, if the feed manufacturer recommends 1.2, I should simply add nutrients till I get to 1.2, and take quiet satisfaction from the fact that I only have to use half as much feed as somebody who starts off with water which is 0.0 (if there were such a thing)…?

    I’m seriously pissed off with the pH meter I bought (pic attached – avoid). First one wouldn’t calibrate properly as they hadn’t supplied the correct sachets for hard water. They sent me another complete meter, with the correct sachets – but both meters calibrate very differently with the same sachets, so I don’t know which (if either) to trust.

    So the mixture appeared to jump way up into the 7’s, I put a drop of phosphoric acid in, and it went down to 4.4 FFS. So I’m using the other meter now, as I think the first one was reading too high, and have managed to get the pH back to 5.8.

    Seems like a hell of a faff though… maybe I’ll grow in soil or something next time!
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  11. #46

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    Don't worry.
    For one as for nutrients forget how much the bottle says.
    You want to start at a low feed so like I say just go by your water your using, I'm going to flick back and see where we're at again sand sub to the right diary.
    We do want to sort the ph meter though.
    The last one you used you said it collaborated properly right?
    and ph down is strong shit I would do that a drop at a time if I were you mate
    Blessings
    Redz

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    OK I've figured one meter is OK, the other one's fucked, so using the first one at 5.8.

    So my total feed (including the water measurement) is coming up at 0.88 - I know you're saying forget how much the bottle says, but the Canna Aqua Vega site says I should be on 1.1 + 0.6, ie 1.7... seems a lot more than were I am...?

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    Ok my background ec is 0.8 so I started my lady's on 1.2 that means there first feed was 0.3. We are going to let the plants tell us when to up it you can even start at 0.2 if you like. And we want to see the ph either stay how it is for now and hopefully get a slow swing up or down?
    I still ain't Seen the ladies in question so I'm just basing this on seedlings/cuts going in a new system or pot
    Redz

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    Right, I can see I'm going to have to go completely against my nature, and keep proper records...

    So this morning we have pH 6.25, EC .876.

    I'll do nothing till this evening, then measure it again...

    Here's a pic - there's only one lady at the moment, as I'm just easing myself into this gently and as simply as possibly!

    If you wanted to do it simply, you shouldn't have chosen hydro, I hear you say...
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  17. #50

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    GAAAHHHHH. Just keep screwing up here. Because the pictures on eBay were the same, I accidentally bought an Essentials EC meter instead of an Essentials pH meter, so now I’ve had to order the pH meter too.

    However… while the nasty little blue EC meter I had is reading around 871 (suspiciously, it doesn't seem to be moving much from there, though the plant seems to be growing strongly), the new Essentials EC meter reads 3.5!

    Now, I thought the blue meter needed to be divided by 1000 to get a reading that people can understand, so I’ve believed my reading so far to be around 0.8 – 0.9. So how the hell can I relate that to 3.5 on the Essentials meter??? I’m assuming the little blue meter is talking complete shite, but of course I don’t know…

    Thanks guys

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  19. #51

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    Hogweed mate, make it easier on yourself and keep your post in the same thread. I'm subbed up to your diary matey
    Atb
    Redz

  20. #52

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    Sorry, you're right. Panicking here. Will go to the other one...

  21. #53

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    And a ec reads either ppm( parts per million) tds(total desolved salts) ec etc. Your going to have to sort which one you are going to use.
    I'm a bit confused because I have got two different ppm readings on my truncheon I ain't got it with me on the bus but I think one is Europe and the other USA I'll have to check.
    I'll check when I get back and get back to you so we can get this sorted finally
    Redz

  22. #54

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    Meet you there lol chill out brother I'll find ya and there's plenty help around bro
    Redz

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    Even more great info for hydro farmers! Thank you

  24. #56

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    Default Is Woody J still here???

    I'm wondering if Woody J is still here using this site as I'm needing a little info about my grow and From what I read and see he really really knows his shizzle so can anyone tell me if he still posts or if he hasn't been see for a while.
    Thanx in advance peeps. Peace...

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    Woody J was last here March last year
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