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Old 01-30-2007, 10:27 PM   #1
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Help Please!!!! Im not sure what to do next.

Hi all, I have a 54 gallon corner tank. I thought it was cycled. Ammonia is 0, Nitrite is 0. In the last 2 days my nitrates have gone from 10 to 20. I did a 20% water change today and rechecked my nitrate level. It was still at 20 and it did not seem to help at all. Ive had my tank up and running for 5 weeks. Should I do another bigger water change or will these nitrates come down slowly on their own? Any help will be appreciated. Thanks!!!
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Old 01-30-2007, 10:36 PM   #2
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I am sure your tank is cycled. Nitrates are the end production. Do another big water change.
Do you have fish? if so, how many etc....
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Old 01-30-2007, 10:46 PM   #3
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I have 2 damsels and a coral banded shrimp. also some snails.. Im worried about the shrimp if the nitrates keep going up. How much of a water change do u think i need?
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Old 01-30-2007, 10:48 PM   #4
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Try doing this...

http://www.melevsreef.com/reducing_nitrates.html
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Old 01-30-2007, 10:49 PM   #5
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I would do at least 25%, and then do it again a couple days later if needed. Youa re right to be concerned about the shrimp.
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Old 01-30-2007, 10:49 PM   #6
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What is your water source? Tap or RO. I suggest you test your source water if you have not done so already.
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Old 01-30-2007, 10:55 PM   #7
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I originally used tap water in the tank but have done 2 water changes now using RO. I have a canister filter that I have not done anything with , meaning I havent cleaned it or anything since I first set up my tank. Could this be contributing to the nitrates?
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Old 01-30-2007, 11:04 PM   #8
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definitely so, clean out sponges and rinse the media in saltwater..
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Old 01-30-2007, 11:10 PM   #9
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I'd still test your source water - even if it's RO - just to rule that out. You'll find several threads around here about folks getting RO water at their LFS that has high disolved solids levels (TDS) in it.
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Old 01-31-2007, 09:20 AM   #10
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Just make sure mix your SW for 24+ hours with a ph and match ph/sg/temp as close as possible to the main when doing pwc, especially when doing a large pwc. If the levels are too far off you can kill of your stock.

Also retest your no3 with the lfs or another test kit to make sure it's accurate. Most test kits for no3 go bad after a year or so and will show higher levels of no3 when they aren't really present IME. My AP test went bad almost instantly testing 5 ppm one week and then a jump to 40 ppm the next. With a new test it was back at 0-5 ppm without doing a pwc.
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