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Old 12-04-2014, 04:30 PM   #1
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0 PPM phosphate reading?

About a month ago, I was having slightly high phosphate readings (0.1). So I started using GFO and biopellets. I tested today, and my phosphate was 0. I test with salifert and it definitely wasn't up to 0.03 ppm. Should I cut back on GFO or blame a faulty test.

Extra info - 90g tank. 100-150 lbs of live rock, eshopps skimmer (I run it fairly dry because I can't keep up with it), dual reactor running GFO and biopellets, and a refugium with cheato. I have a bit of algae on the glass, but I believe just as much as most people get. What I've recently scraped, has not come back.
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Old 12-04-2014, 08:01 PM   #2
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I'd try testing again. Mistakes happen sometimes with tests, but 0 phosphates pretty much doesn't exist.
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Old 12-04-2014, 08:29 PM   #3
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Quote:
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I'd try testing again. Mistakes happen sometimes with tests, but 0 phosphates pretty much doesn't exist.
I actually tested 4 times. All the same result -- 0.
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Old 12-04-2014, 08:52 PM   #4
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Well, how's the tank doing? If good just let it go.


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Old 12-04-2014, 09:36 PM   #5
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Quote:
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Well, how's the tank doing? If good just let it go.


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Doing pretty good, but I'm also not SPS heavy.
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Old 12-04-2014, 10:01 PM   #6
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Im just starting at this, but my buddy was telling me he had some really nasty algae, but his phosphate was reading 0. What everyone told him was that he had high phosphate or something else, and the algae was just consuming every bit of it.

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Old 12-04-2014, 10:02 PM   #7
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If same test kit was reading 0.1 before and now it reads 0 then I would not say that it is faulty. Salifert is a good test kit and I'm using it also. Just take note that you are comparing colors and the 0.03 is almost white. I suggest using a natural light so you can really see the difference.
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Old 12-04-2014, 10:57 PM   #8
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Quote:
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If same test kit was reading 0.1 before and now it reads 0 then I would not say that it is faulty. Salifert is a good test kit and I'm using it also. Just take note that you are comparing colors and the 0.03 is almost white. I suggest using a natural light so you can really see the difference.
It was definitely straight white. I couldn't see a hint of blue. I put the test bottle on top of 0.03 and looked down from top. For redundancy, I will test my freshwater tank, where I dose phosphate.
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Old 12-04-2014, 11:15 PM   #9
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The effect of 0.00 phosphate will not show on corals right away. You will see it in weeks or months but it also depends on what you have.
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Old 12-04-2014, 11:39 PM   #10
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Ill start feeding more. I have a low amount of fish and theyre all fat, so I feed a small amount about the every week.
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