New Tank Cycle

Discussion in 'New to Reefing' started by Dave Bees, Feb 27, 2016.

  1. Dave Bees

    Dave Bees

    Feb 27, 2016
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    Hi everyone I'm very new to saltwater fish keeping.

    I have recently purchased a 25 gallon Fluval M90 Aquarium ,well 26 days ago to be precise.
    The problem I have is I don't know if it's cycling as the test results seem to go up and down
    I have approx 18 kg of cured live rock 10 kg of Carib live sand and nothing else in the tank apart from a lot of brown nasty stuff on the rocks and sand. image.jpeg image.jpeg image.jpeg
    The Rock has been in the tank 21 days now and I haven't seen any living thing at all. I have included a few pics and my test results and was wondering if anyone out there could give me some idea of what's happening,many thanks in advance...
    Dave Bees, Feb 27, 2016
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  2. Dave Bees


    Aug 23, 2011
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    Welcome to the forum Dave! Hopefully someone will be able to help you out here :)
    Becky, Feb 29, 2016
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  3. Dave Bees

    salt_for_brains Alabama Reefer VIP Member

    Jan 8, 2013
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    Leroy, Alabama
    Hi Dave and welcome to Living Reefs!!

    What kind of test kit are you using. Sometimes API will give you false positive readings. It is a little more difficult to notice a substantial cycle when you use cured live rock. Looking at your numbers it appears you had a cycle. Now I believe you are getting some bogus numbers on your ammonia and nitrites. You have diatoms which comes with a new setup. I would do a 10-20% water change and see where your numbers go. I would also mix your water change with your SG around 1.027 and try to bring up your total SG to the 1.025 number. Let us know what happens. Good luck!
    salt_for_brains, Feb 29, 2016
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