How much is too much? - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 03-15-2006, 11:54 AM Thread Starter
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How much is too much?

How much phosphate in the water is too much? I have a 10gal, moderately planted tank, 2.5 wpg of cf at 6500K, no CO2, no fertilizing yet pH 7, relatively soft water. The tank is a month old and not completely through the fishy cycle, i.e. minimal nitrates yet. I have 3 small glass tetras who seem to be thriving. I have had NO cloudy water or algae blooms. (sshh!, don't spread it around). My AP kit is reading 2, which is roughly the level of phosphate in my tap.
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post #2 of 7 (permalink) Old 03-15-2006, 01:50 PM
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Welcome to TPT!

That's a good level...I've seen tanks with concentrations higher than 5.0
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post #3 of 7 (permalink) Old 03-15-2006, 03:19 PM
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2ppm of PO4 straight out of the tap? Pretty lucky guy! You'll be fine.

Mike

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post #4 of 7 (permalink) Old 03-15-2006, 05:32 PM Thread Starter
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Quote:
Originally Posted by Momotaro
2ppm of PO4 straight out of the tap? Pretty lucky guy! You'll be fine.

Mike
Gotta love NYC water!

All other things being in sync, at what level would PO4 be a problem?
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post #5 of 7 (permalink) Old 03-15-2006, 05:39 PM
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fj pod...I am starting my tank next week, and I am in NYC....Hadn't tested tap yet...I am psyched!
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post #6 of 7 (permalink) Old 03-15-2006, 07:04 PM
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If you are referring to algae being caused by high PO4 levels, that isn't what causes algae. So, on that basis alone, there isn't a "too high" level. However, eventually any fertilizer can be at a high enough level to affect the fish. And, very high phosphate levels can really mess up measuring CO2 levels if you inject CO2.

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post #7 of 7 (permalink) Old 03-15-2006, 07:47 PM Thread Starter
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Quote:
Originally Posted by Hoppy
If you are referring to algae being caused by high PO4 levels, that isn't what causes algae. So, on that basis alone, there isn't a "too high" level. However, eventually any fertilizer can be at a high enough level to affect the fish. And, very high phosphate levels can really mess up measuring CO2 levels if you inject CO2.
I won't be using CO2 for now...Isn't it a combination of NO4 and PO4 that causes algae? Even at levels that won't necessarily affect fish?
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