What is a good PO4 level - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 03-19-2006, 04:08 PM Thread Starter
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What is a good PO4 level

I just tested my PO4 level and it is at about 1.0 ppm right before I did a water change.What is a good level?Reason I am asking is I over did it a couple of weeks ago and I am getting it to come down and was wondering what ppm I should be trying to get it to.My tank is 20 gal. with pressurized CO2 with 3.5 watts per gal.if thats needed for any help.
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post #2 of 6 (permalink) Old 03-19-2006, 04:44 PM
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It depends on a few factors, what is your NO3? If is around 10ppm then you are in a good range, you want to shoot for a 10:1 ratio. If you start to see green spot algae then you know that you need to up your PO4 a little.


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post #3 of 6 (permalink) Old 03-19-2006, 11:00 PM
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I gave a 20 gallon with 65w and I keep my po4 at 2ppm. If I forget to dose a day, I get GSA all over the glass.
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post #4 of 6 (permalink) Old 03-19-2006, 11:44 PM Thread Starter
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Quote:
Originally Posted by bigstick120
It depends on a few factors, what is your NO3? If is around 10ppm then you are in a good range, you want to shoot for a 10:1 ratio. If you start to see green spot algae then you know that you need to up your PO4 a little.
My NO3 is at 10ppm and my NO4 is at 1.0 ppm after the water change.
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post #5 of 6 (permalink) Old 03-20-2006, 01:45 AM
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Your levels are fine. How are your plants?

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post #6 of 6 (permalink) Old 03-20-2006, 11:48 AM Thread Starter
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Plants are ok,corkscrew vals are a little week but I think that might be from transfering them from one side of the tank to the other.Getting a slight case of spot algae on some of the plants.
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