Refrigeration of fertilizers?? - The Planted Tank Forum
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post #1 of 9 (permalink) Old 11-13-2020, 05:20 AM Thread Starter
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Refrigeration of fertilizers??

Is it good to refrigerate fertilizers? As tropica states to keep them under 25C, its impossible for many like us who stay where weather is pretty warm 8months of the year.

However iv not seen anyone refrigerating it, also the shops here dont do that, and they say it has never caused a problem.

Im confused.

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post #2 of 9 (permalink) Old 11-15-2020, 04:43 AM
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You don't have to keep them in the fridge, though micronutrients can sometimes get moldy, which is why it's recommended to keep them in the fridge.

Shops likely don't bother, because they go through the bottles quite quickly, compared to a hobbyist (though some may have multiple tanks as well!)
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post #3 of 9 (permalink) Old 11-15-2020, 05:06 AM Thread Starter
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Originally Posted by Darkblade48 View Post
You don't have to keep them in the fridge, though micronutrients can sometimes get moldy, which is why it's recommended to keep them in the fridge.

Shops likely don't bother, because they go through the bottles quite quickly, compared to a hobbyist (though some may have multiple tanks as well!)
Does mold affect the fertilizer?

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post #4 of 9 (permalink) Old 11-18-2020, 04:47 AM
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my micros get nasty growths very fast if I don't keep them in fridge.
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post #5 of 9 (permalink) Old 11-18-2020, 04:58 AM Thread Starter
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my micros get nasty growths very fast if I don't keep them in fridge.
Yes, i saw some mold today, i refrigerated it today itslef

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post #6 of 9 (permalink) Old 11-18-2020, 01:47 PM
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Try adding 1 mg / 1 ml ascorbic acid (antioxidant) and 2 mg / 5 ml potassium sorbate (mold inhibitor) to the bottles and you may not need to refrigerate them.
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post #7 of 9 (permalink) Old 11-18-2020, 05:23 PM
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I've always wondered about this, so I thank you for asking the question and for everyone who answers.
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post #8 of 9 (permalink) Old 11-19-2020, 03:04 AM
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Does mold affect the fertilizer?

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I don't think there has been any study done on this, but you'd imagine that the fungus that grows must be growing because it's using up some of the nutrients that is in the micro solution.


It doesn't mean it's not usable, just perhaps not as potent.

Anthony


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post #9 of 9 (permalink) Old 11-20-2020, 04:01 PM
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Micro nutrients are "chelated compounds" I usually add 2 ml of Glutaraldehyde (25%) to prevent mold and keep it in a dark place. these decompose under bright light and will precipitate. once this happens it is basically useless to plants.

You don't need to do anything with macronutrient solutions. They don't go "bad".

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