Keeping Nitrate Low - The Planted Tank Forum
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post #1 of 6 (permalink) Old 11-02-2014, 02:02 AM Thread Starter
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Keeping Nitrate Low

A lot of information, on quite a few plants, indicate that to get great color the nitrate needs to be kept lean,...any truth to this? aromatic

Just a couple of Quick examples I found....

The reason I am asking is, looking at some of the tanks that do full EI fertilization, ....all the plants exhibit great color, without limiting kno3...
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post #2 of 6 (permalink) Old 11-02-2014, 02:13 AM
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Light plays a huge role. I had 2 aromaticas in 2 parts of my tank. One was getting less light and was green on the top with a hint of pink under the leaves while the other one was a little purple on the top had dark purple bottom leaves was getting full blast of the light @ 100 PAR. I am running 10+ ppm which is no where close to 40 ppm @ nitrate chart but darker than the 10 ppm color.

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post #3 of 6 (permalink) Old 11-02-2014, 02:27 AM
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A rather interesting, very techincal discussion involving Tom Barr on the topic:

And older:

Tom at least proves that low nitrate is not needed to achieve spectacular reds.

Now, is nitrate shortage a way to stress a plant and bring the reds up? Yes, but only because the plant is stressed and producing less chorophyll, and the plant looks redder. Not really a good way to achieve this, as if the plant were a green one, it would be turning pale from the deficiency. See post #20 in the first thread..
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post #4 of 6 (permalink) Old 11-02-2014, 04:14 PM Thread Starter
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Thanks for the links..interesting read for sure. I dose a modified pps pro with no kno3...I was thinking of adding it because of the k...I have been keeping nitrates around 10ish but by the end of the week I haven't noticed it going down...usually around 20ish...Should I add it to the mix? The tank is a 75 gallon, pressurized co2 with rex grigg style reactor, is 2 ecoxotic e-series with a sat + in the middle with only the reds and blues on..just trying to get the best color I can from the plants....Thanks for your help
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post #5 of 6 (permalink) Old 11-03-2014, 12:31 AM
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If the NO3 is between 10-20 ppm, then I would not dose more.
If you need more potassium then try K2SO4.
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post #6 of 6 (permalink) Old 11-03-2014, 01:35 AM Thread Starter
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I am adding quite a bit more k2so4 than the original PPS pro recipe calls for. I add 47g to my 500ml bottle and dose 10 ml per day. kh2po4 29g, mgso4 20g, csm+b I add 52 grams to separate 500ml bottle..10ml a day with around 23g of 10% iron chelate...plants do great but I cant seem to get rid of the GSA...I was wondering if adding the kno3 would help or maybe adding more po4..?
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