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Thread: pH and EC Meters?

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    Default pH and EC Meters?

    1. Why Use pH and EC Meters?

    A pH meter measures the acidity of the water on a scale from zero to 14. This scale is not a linear scale, but an exponential scale. This means that the difference between a pH of six and a pH of seven is gigantic. When the pH is too high or too low, the roots cannot take up the nutrients in the proper proportions. Generally, this will show up in the plant as deficiencies of one nutrient or another, and as burnt leaf tips, caused by overfertilization of one nutrient. The result is that growth will slow, the yield will be low, and ultimately, the plant may die.
    One remedy is to give the plants fewer nutrients, but then they are certain to develop even more deficiencies, and the yield will not be as good as it can be. When the pH is just right, it is unlikely that deficiencies will occur. The plant will be able to take up the nutrients in the correct proportions and overfertilization will be a thing of the past.


    In other words: with the wrong pH, half the recommended nutrients will cause overfertilization. With the right pH, the full recommended dose will make for healthy and strong plants.

    An EC meter measures the electrical conductivity of the water. Clean water has a low EC. When you add nutrients and pH adjusters, the EC will go up. You can use this for measuring how many nutrients can put in the water without causing overfertilization.

    It can be hard sometimes to eyeball the required amount of nutrients. Sometimes, you're not quite sure how big your container water is or you have no means of measuring the nutrients accurately. Even if all these things are no problem, it is still possible that the recommended dosage of nutrients as printed on the label is too low for your plants, and your plants would benefit from a higher dose. Using an EC meter together with a pH meter, you can measure the optimum dose for your plants without causing overfertilization.




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  3. #2

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    gd info for people that dont know
    my input:

    its good to have a slight fluctuation of ph but only 5.5-6.5 as different amounts of nutrients are taken in at different points in that range. for soil growers phing all your waterings and feeds can increase yields and ofcourse letting water stand for a day or 2 or filtering it before giving it to the plant.

    ec is a pain to measure with soil grows so most soil growers avoid it but essential for hydro, you can also measure in tds or ppm but they are different

    if the ph in the res goes up(alkaline) more nutrient than water is being taken in by the plant, if the ph goes down(acid) more water is being taken in than nutrient

    if the ec in the res goes down quickly then the plant is feeding lots so increase the feed slightly
    if it goes up quickly then decrease the feed
    if it stays the same then dont change it

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    more good info a13x for people




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    damon7 (18-07-10)

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    Also,
    Always pay the most you can afford for the meters and be wary to battery life, the cheaper Ec meters will give false readings once the battery life is near the end and it is easy to continue adding more nutes to get the ec up when really it is way over.
    There are some on the market that give low batt warnings so try to get one of these if poss.
    and always have spare batteries

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    just won some ph/ec meters on the good old fleabay ..I only did a offer and i won lol...now need some calibration fluid..




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    Hi mate glad to hear you've got that sorted, can you show us which ones you decided to get?

    Also,
    Always pay the most you can afford for the meters and be wary to battery life, the cheaper Ec meters will give false readings once the battery life is near the end and it is easy to continue adding more nutes to get the ec up when really it is way over.
    There are some on the market that give low batt warnings so try to get one of these if poss.
    and always have spare batteries
    Notwithstanding your tight budget nogood I do agree with muller. The bottom line is you will get what you pay for, but hopefully even the cheaper meters will be OK for this grow and you can upgrade when you've got some spare cash.
    Last edited by illearth67; 20-06-10 at 09:19 PM.
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    Quote Originally Posted by illearth67 View Post
    Hi mate glad to hear you've got that sorted, can you show us which ones you decided to get?



    Notwithstanding your tight budget nogood I do agree with muller. The bottom line is you will get what you pay for, but hopefully even the cheaper meters will be OK for this grow and you can upgrade when you've got some spare cash.
    I know these are not the best ones on the market but here you go..ph/ec meters
    got a ph range of Measurement Range: pH 0.0 to 14.0 pH




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    Nice find mate they look like a great deal for the money and free delivery too.
    I was checking the seller's feedback and he doesn't have a single negative feedback and only 4 neutral in the last year so his reputation isn't in question and he has sold 14 of these already so you may just find you got yourself a good product at a bargain price but only time will tell I suppose.
    Last edited by illearth67; 20-06-10 at 09:36 PM.

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    cheers..roots growing mad now mate..will take a pic soon




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