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Old 07-09-2011, 02:32 PM   #1
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Confused about my cycle. Can it restart?

Hi everyone, I am new to the saltwater world and am confused about my cycle. I have a 75g tank filled with 50 pounds of regular rock from reef cleaners and 35 pounds of cured live rock from my LFS. I have had the tank together for little over a week now. I introduced two medium raw shrimp on the first day in a mesh bag to get the cycle going. I have not been turning on any lights and have had my protein skimmer running since day one. It is pulling plenty of dark, smelly stuff from it. I have been testing my levels ph, ammonia, nitrite, and nitrate, and salinity levels from day 1. So far I only received a small ammonia spike to about 0.5ppm, nitrite to 1ppm and nitrate to 20ppm. Salinity is in between 1.023-1.024, ph is 8.0. Temp at 79 degrees. Well yesterday I tested my water and it seemed like ammonia was down to 0 (so hard to tell the ammonia on the API color chart for me but it was the lightest it has ever been), nitrite was clearly 0 and nitrate was 40ppm. Today though it seems like the ammonia went back up to 0.5ppm (darker today) and nitrite is still 0 and nitrate is still 40. I am confused. I know little over a week is not enough time for the cycle to finish but why would everything seem to be progressing and all of a sudden it seems to have restarted. Should I remove the shrimp? Should I do a water change? I'm just confused and have learned so much from this forum already. Thank you all!
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Old 07-09-2011, 02:42 PM   #2
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if you used cured live rock thats the reason you probably cycled quickly and if you left the raw shrimp in there thats probably why your ammonia keeps rising then falling
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Old 07-09-2011, 03:07 PM   #3
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The LFS told me it was fully cured live rock. I also added mixture of aragonite sand and live sand which I forgot to mention when first starting things up. So then what should I do next? Remove the shrimp? Water change?
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Old 07-09-2011, 03:48 PM   #4
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i would remove the shrimp and do a water change as this point and see where your nitrates,ammonia and nitrite are but usually when you have nitrates and 0 ammonia and 0 nitrite your cycle is done
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Old 07-09-2011, 03:59 PM   #5
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do a pwc and then add some fish food then check your readings after a while,if amm and trites are 0 then your cycled,ps you didnt need the skimmer running while you were cycling.
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