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Tom Barr suggests dosing 10 ppm nitrates twice per week with a 50% water change weekly. That means that if the plants don't take up any nitrates (worst case) your nitrate level would peak at 40 ppm. So 40 ppm nitrate isn't the end of the world. Just don't do a water change. As the plants suck up the nitrate, its concentration should go down. You've got pre-fertilized water! We could bottle it and sell it! :lol:

Steve Pituch
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