KNO3 overdose? - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 12-11-2008, 04:16 AM Thread Starter
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KNO3 overdose?

How much is too much for a 20g tank?
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post #2 of 6 (permalink) Old 12-11-2008, 02:20 PM
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Way beyond what we dose for these tanks. Over 100ppm. You'll have issues with shrimp, etc before fish and plants....


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post #3 of 6 (permalink) Old 12-11-2008, 03:50 PM Thread Starter
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over 100 ppm??
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post #4 of 6 (permalink) Old 12-11-2008, 04:27 PM
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Yes. I don't recall what the figures were that Tom Barr aka plantbrain came up with, but they are well over 100ppm N03. If you have +/-100ppm N03 in your tank--then it's time to do a water change and start figuring out why there is so much N03.


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post #5 of 6 (permalink) Old 12-11-2008, 06:29 PM
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even if you are really off a fair amount, targeting 10-30ppm is easy to day.
there's not much need for anything over 30ppm I am aware off, so that's more a max amount you'd ever want, if you have less light etc, then you should consider adding less.

I've not seen many tanks that use more than say 25-30ppm per week of NO3 as well, but you want to maintain and residual for optimal growth, not go from 30ppm down to zero or close to it by week's end.

So keeping a mid range of 20ppm is not bad either. If you have less light, sediment based ferts, then you can get away with more variation/less since you have a back up supply and with less light= less CO2 demand= less nutrient demand= less change= less growth.


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post #6 of 6 (permalink) Old 12-11-2008, 06:56 PM Thread Starter
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does the same apply for K and P?
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