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Thread: What is buffering my nutrient reservoir?

  1. #11

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    Guess it must be the air stone - as the plants don’t interact with the res.

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  3. #12

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    It's a small res too, mate. You'll see bigger and quicker swings in ph and ec the smaller the res is.

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  5. #13

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    Quote Originally Posted by WhIpLaSh View Post
    My guess would be the airstones. Wouldn't take them out though You need that DO2 in your res.
    ha ha i meant for a while not too long
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  7. #14

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    Quote Originally Posted by WhIpLaSh View Post
    It's a small res too, mate. You'll see bigger and quicker swings in ph and ec the smaller the res is.
    mate the plants roots are not in it. its purely a nute mix and pump with stone.

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    Quote Originally Posted by SmobyToker#1 View Post
    mate the plants roots are not in it. its purely a nute mix and pump with stone.
    Yeah I know, mate. I used to grow in a non-modified Wilma and the swings still happened and it's definitely more severe the smaller the res is. Just my personal experience

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  11. #16

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    I used to run a pH probe and dosage pump on my old reef tank.

    May consider similar to keep the reservoir in range.

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  13. #17

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    Are you bubbling the RO only, or is the Nutirent in RO? If you lack hydroxyl ions in the water, then the pH will not stabilize! You can acidify the water all you want but it won't stabilize. The amount of free hydrogen in the water is considerably more unstable because each atom has two hydrogen, molecules and one oxygen molecule. If the hydrogen does not have anything to linked to, then it floats, because of the quantity of (H)in the water, "so to speak". That's why YOU CANT GET AN ACCURATE pH READING IN WATER with less than 120 to 200 ppms in it. If anyone tells me they pHed their RO, distilled, or rain water without anything in it, I know they made a common mistake. Their ppm is too low for an accurate reading! Please remember its not the acid by its self, that sets pH, but the alkalinity linked to the acid that sets the pH.

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  15. #18

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    No, I am bubbling a nutrient solution at EC 0.6.

    The way I make the solution is

    1) Add 2.5ml of cal-mag to 5 litre of RO water tested to < 15 ppm
    2) Add 4ml of canna A+B part A to 5 litre. Shake well
    3) Add 4ml of canna A+B part B to 5 litre. Shake well
    4) Add 2.5 ml of Buddha Tree Silicon to 5 litre. Shake well.
    5) Add 10ml Rhizotonic to 5 litre. Shake well.
    6) pH down to 6.0

    Leave for an hour, re-test, adjust, leave an hour.

    I then add to the reservoir, and now, re-test the pH and adjust again.

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  17. #19

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    Quote Originally Posted by creeperpark View Post
    Are you bubbling the RO only, or is the Nutirent in RO? If you lack hydroxyl ions in the water, then the pH will not stabilize! You can acidify the water all you want but it won't stabilize. The amount of free hydrogen in the water is considerably more unstable because each atom has two hydrogen, molecules and one oxygen molecule. If the hydrogen does not have anything to linked to, then it floats, because of the quantity of (H)in the water, "so to speak". That's why YOU CANT GET AN ACCURATE pH READING IN WATER with less than 120 to 200 ppms in it. If anyone tells me they pHed their RO, distilled, or rain water without anything in it, I know they made a common mistake. Their ppm is too low for an accurate reading! Please remember its not the acid by its self, that sets pH, but the alkalinity linked to the acid that sets the pH.
    Damn thats insightful!!! how does it get fixed creeper?

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  19. #20

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    Quote Originally Posted by WhIpLaSh View Post
    Yeah I know, mate. I used to grow in a non-modified Wilma and the swings still happened and it's definitely more severe the smaller the res is. Just my personal experience
    That would be either down to the plant using nutes and making the water in pot more concentrated or as crepper says below no ions in the water.

    The op has purely a tub with feed in that he gets where he needs it and then fills his res, so the swing is not due to plants, but maybe what creep says is right, god knows man, willing to read about that though, interesting.

    I agree with you mate, the smaller the res the more quickly its affected. Hmmmm i might try dwc again....

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