High levels of NO3, can it cause algae? - The Planted Tank Forum
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post #1 of 4 (permalink) Old 08-08-2006, 10:54 PM Thread Starter
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High levels of NO3, can it cause algae?

My 10 gallon that's been running for a few months and giving me no troubles at all has started to show the first signs of an algae bloom in the water, as well as small spots of BGA and BBA on a couple plants. I noticed that my water has a pretty high amount of NO3, and I don't have tests for anything other than ammonia, kh, nitrite or ph to test the rest of the nutrients.

Something is unbalanced, so I'm wondering if once I get the other nutrient tests, if I add the nutrients that I suspect are lacking, will the plants start better consuming the excess NO3, or am I going to just have to do drastic water changes?


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post #2 of 4 (permalink) Old 08-09-2006, 12:32 AM
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How much light? Are you running CO2? Just adding NO3 wont grow plants, you need NPK and micros=Iron and trace minerals to grow plants
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post #3 of 4 (permalink) Old 08-09-2006, 03:50 AM Thread Starter
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I'm not "adding" NO3, my biological filter is producing it. Right now i've got about 14ppm of CO2 in the tank, dosing Flourish once a week, and 28 watts over the 10g for 12 hours.

edit: I realized just now I may not be using the right Nitrogen reference...my nitrates are high, so I suppose that could be NO2, or is your nitrate reading also a measure of NO3?


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post #4 of 4 (permalink) Old 08-09-2006, 04:46 AM
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May I suggest you do some reading in Rex Grigg's website?

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