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Hi, My system has been cycled since October and has been testing fine. Now  gradually my nitrate level has dropped all the way down. PH is good, Nitrites are good. I have 4 beds full of mature plants and about 80 Tilapia in the fish tank. Any ideas what I need to do to increase the nitrate level back to normal. Thanks

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How is the system doing now, what did you try? I have a new system that has done the same. Not sure if I should get more fish, feed more, or pull some plants.

All of the above will increase your available nitrates.

jessica Greenhow said:

How is the system doing now, what did you try? I have a new system that has done the same. Not sure if I should get more fish, feed more, or pull some plants.

feed more even if its just rotting it will turn to nitrate. Or feed twice a day instead of once. You could also add more fish. All of those would work just fine. 

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