11-05-2011, 03:30 PM
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I just added these rocks so the sponges etc were there when I added them to my aquarium. I haven't tested for phosphates but I know they have to be low now. I did a large tank change with RO because I recently found out water from my new tap ( I just moved) has high Ammonia & Nitrates. Like .50ppm NH3 & 5.0ppm NO3. I don't mind encouraging growth but I do want to make sure the levels aren't so high to harm the fish. I mean in nature there are some levels of Nitrates & Ammonia. I will monitor to ensure the bacteria are eating them up.