do dry ferts get too old? - The Planted Tank Forum
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post #1 of 6 (permalink) Old 10-27-2015, 05:06 PM Thread Starter
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do dry ferts get too old?

Quick question. It just occurred to me that maybe the reason my growth hasn't been as good as I expected, is because my dry ferts are about 7 years old. It never occurred to me they would lose their potency until just now. Would this make a difference?


They've been sealed in bags in a dark dry place all this time since I stopped using them years ago.


Thanks!
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post #2 of 6 (permalink) Old 10-28-2015, 01:16 AM
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The fertilisers are all right but the way to use them may have been lost by the keeper.

If you have a choice, you have a problem, till you elect your choice. No choice, no problem, only consequences, learn to live with them.
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post #3 of 6 (permalink) Old 10-28-2015, 01:32 AM
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Ferts dont go bad, that is like asking if your salt will go bad. You may be dosing the wrong amounts or something similar
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post #4 of 6 (permalink) Old 10-28-2015, 04:19 PM
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Which particular fertilizers. Some may oxidize over time I suppose, or lose potency if left in the sun for example, but without knowing which chemicals in particular and how they've been stored, it would be hard to say if they are still working properly.
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post #5 of 6 (permalink) Old 10-29-2015, 01:04 AM
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OP stated
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They've been sealed in bags in a dark dry place

You said they've been stored for years. So, did you just start a planted tank again or just start dosing again?
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post #6 of 6 (permalink) Old 11-02-2015, 10:48 PM Thread Starter
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I was referring to all the standards, KNO3, KH2PO4, K2SO4, CSM+B, GH Booster.

I was pretty certain they'd be fine, but the growth just isn't quite there yet so it popped into my head. Like some chemicals and meds lose potency.

I stopped dosing my tank about 5 years ago when my clown loaches decided to not be compatible with plants anymore. This is a new tank (1 month) so I've dug everything back out from before.

I'll just stick with it and see if the plants get happier with more time. It's been 10 years since I've started a new planted tank so I don't remember going through an initial lull like this.
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