Don't dose micros and macros on the same day - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 11-02-2014, 04:18 PM Thread Starter
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Don't dose micros and macros on the same day

Unless you want a cloudy 180 gallon snow globe instead of a fish tank.

Here's my guess
One of the micro nutrients reacted with phosphate, nitrate or sulfate macro fert ions and created insoluble salts. Those salts precipitated out, and made the water cloudy.

I have no idea what or why though, because iron nitrate and sulfate are both water soluble at STP. I'm not sure about phosphate.

Any other chemistry nerds out there?
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post #2 of 7 (permalink) Old 11-02-2014, 04:27 PM
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If I remember correctly, it had something to do with the iron and phosphates mixing which is why many dose micro/iron one day and NPK the next. Since I dose Seachem Iron I get the cloudy tank regardless of how I dose, lol.

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post #3 of 7 (permalink) Old 11-02-2014, 04:30 PM
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The Iron and Phosphate react and combine into something plants can't use. That's all I remember, lol.
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post #4 of 7 (permalink) Old 11-02-2014, 05:52 PM
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i dose them both at the same time everyday and i do not have any issue, these reactions are more related to those who have high Kh/Ph, those with lower Kh/Ph and acidic water will not see these reactions, same is true when making all in one fertilizer (acidic solution).

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post #5 of 7 (permalink) Old 11-02-2014, 06:03 PM
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dosing

I dose them everyday at the same time together and have never had a problem.

Last edited by rick dale; 01-11-2015 at 05:46 PM.
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post #6 of 7 (permalink) Old 11-02-2014, 06:09 PM Thread Starter
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Quote:
Originally Posted by happi View Post
i dose them both at the same time everyday and i do not have any issue, these reactions are more related to those who have high Kh/Ph, those with lower Kh/Ph and acidic water will not see these reactions, same is true when making all in one fertilizer (acidic solution).
My KH/GH is definitely sky high. Our water here is somewhere in the liquid rock range, which is why I went with rainbow fish, they like hard water.

And yes, the micro I dosed was a little flourish iron, for the red ludwigia and A. Reinecki. Believe it or not they've both kept red color in my tank.
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post #7 of 7 (permalink) Old 11-03-2014, 05:52 AM
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As mentioned, iron (III) phosphate will form an insoluble precipitate.

Anthony


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