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Old 11-08-2013, 03:20 PM   #1
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Cycle using two prawns

Hi all, now on day three using two raw prawns for my cycle to help speed things up. These are my readings, nitrite 0 nitrate is 0 and ammonia is between 0.25-0.50. Any thoughts on cycle progress or has my tank cycled. Tank has been running for 21 days. Also my skimmer is skimming some gunk?.
18kilo live rock live sand and lots of critters that came with live rock. Crab,bristle worm , snails etc tank size is 33g -149l. Many thanks
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Old 11-08-2013, 03:24 PM   #2
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If you detect ammonia or niTRITE then your tank is not cycled.

And you really can't speed up the process unless you use all established live rock from another tank.
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Old 11-08-2013, 03:27 PM   #3
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Ok this is second test I have done using prawns and both times it showed ammonia. If I leave prawns in Will ammonia go up and start to produce nitrate?
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Old 11-08-2013, 03:34 PM   #4
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Might as well throw out the 21 days as you didn't have an ammonia source to begin with. You cycle started 3 days ago when you finally added the shrimp. Expect to wait another few weeks for the cycle to complete. Now that you are detecting ammonia is a good thing. Means your tank is actually cycling now. Eventually niTRITEs will go up then niTRATEs will go up. Continue to test. Once ammonia and niTRITES go to 0 then cycle complete.
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Old 11-08-2013, 03:37 PM   #5
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I thought so (gutted) do I leave the prawns in the tank?
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Old 11-08-2013, 03:39 PM   #6
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Lfs told me to just leave it as I had live sand and rock. Good job I done some research!!
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Old 11-08-2013, 03:43 PM   #7
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That can work but you didn't detect any ammonia from the beginning. This says you haven't started a cycle yet. And you can't believe everything your LFS says. They may not be as knowledgeable as you think.

Leave them in till your cycle completes. You may not need both of them though.
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Old 11-08-2013, 03:59 PM   #8
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Ok thanks for your input basically if ammonia goes through the roof should I then take one out?
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Old 11-08-2013, 04:06 PM   #9
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I would just take one out now. Two aren't necessary.
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Old 11-08-2013, 04:14 PM   #10
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Ok will do. Thanks again
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