Phosphates in ADA ferts system. - The Planted Tank Forum
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post #1 of 5 (permalink) Old 02-26-2019, 02:47 PM Thread Starter
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Phosphates in ADA ferts system.

Hallo.
As I know the old system fertilizers has contained nitrates and phosphates. Seem to be It had a strange ratio N : P in "special shade" and "special lights" (Tom Barr gives that data). But now ADA has only Nitrates (without phosphates) in their Nitrogen ferts. Am I right?
Anybody knows how does ADA recommend to add phosphates in an aquarium using their new ferts system?
Or ADA believes that aquarium saturates on phosphates with help fish only? But...What about the small number of fishes in tanks? I don't like oversaturating of fishes.
Thanks a lot.
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post #2 of 5 (permalink) Old 02-26-2019, 05:47 PM
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In the old fertilizing system PO4 was already so low and unnecessary they decided to scrap it and rely on fish food and fauna waste. They recommend keeping PO4 at or lower than 0.05 ppm in the water column.

The new fertilizing system also scraped NH4 and NO3 and replaced it with urea, and recommend monitoring NO3 because excess urea accumulates as NO3.

For few, this is still considered outrageous and firmly intolerable, but in reality most planted aquariums all over the world grow beautiful plants using these levels and compounds.

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Last edited by Edward; 02-26-2019 at 08:22 PM. Reason: .
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post #3 of 5 (permalink) Old 02-27-2019, 01:28 AM
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Correction: Urea turns into NH4, not nitrate. Any OTC fertilizer that indicates urea (carbamide) as the nitrogen source will not contain urea as it slowly changes to ammonium in solution.
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post #4 of 5 (permalink) Old 02-27-2019, 02:31 AM
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Urea => NH4 / NH3 => NO2 => NO3
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post #5 of 5 (permalink) Old 02-27-2019, 04:07 AM
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That's only after nitrification. I was referring to what occurs in the bottle.
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