Dosing Potassium and Iron on same day? - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 04-12-2015, 03:15 PM Thread Starter
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Dosing Potassium and Iron on same day?

I have searched the forums, and there are so many different answers, sorry if this was already mentioned. Can you dose these two like 15 minutes apart on same day?
I am using seachem flourish liquid ferts for now. Will look into dry once I am finished with these.
Thank you for responces.
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post #2 of 6 (permalink) Old 04-12-2015, 04:17 PM
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The only fertilizer chemicals that shouldn't be dosed at the same time are the various iron chemicals and phosphate chemicals (KH2PO4). Those two will form an iron + phosphate compound that is insoluble in water, thus unavailable to the plants.

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post #3 of 6 (permalink) Old 04-12-2015, 05:27 PM Thread Starter
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Hey hoppy... Thanks. so I should dose my reg. Flourish Comprehensive on a separate day. I see it has phosphates in it. or do I wait 15 minutes. and then I can dose my other liquid Ferts?
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post #4 of 6 (permalink) Old 04-12-2015, 05:35 PM
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I dose all ferts minus fe on the same day alternating days between it. Dry ferts are the way to go. Much cheaper and you can tailor your mixtures or amount of dry to target dose. I had much better results doing pps pro with fewer water changes. Every 2 weeks vs every week.


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post #5 of 6 (permalink) Old 04-12-2015, 07:24 PM
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Hoppy is right.Even more so ,I confirm using an Iron +trace complex ,which also includes K.

Look up Ferropol by JBL ,and read the contents.No problem there.

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post #6 of 6 (permalink) Old 04-13-2015, 12:56 AM
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Comprehensive has a *trivial* amount of phosphorous (P), so little it doesn't even react with the iron that it also contains...

I'd not worry about dosing comprehensive and iron on the same day, as long as you're not ODing by double-dosing iron...

I'd worry a tiny bit about dosing seachem iron and seachem phosphorous on the same day, although you'd have to dose a lot more P than seachem suggests to matter.

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