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Do I strip it all down and start again

Discussion in 'Algae Control' started by outbackdean, Mar 31, 2005.

  1. outbackdean

    outbackdean Junior Poster

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    HI
    I have been battling a BGA problem for about six months I have tried more and more No3 + k etc . blackouts etc etc
    this tank has been set up for about 4 years and was going great (photos of tank then http://www.users.bigpond.com/dmwilliams/photo.htm ) until we had a water shortage 12 months ago (Water from tap was unusable 650ppm in hardness could not even use it on the garden as it would kill anything it touched )
    so I was using RO and adding all of the rest of the minerals etc.
    then six months ago the BBA started and I beat that but then the BGA started and it has been down hill form there.
    so my question is do I need to start all over again ,
    Now tank specs
    500 litres all glass no lids
    280watts of Fluro lighting (10 to 12 hours)
    pressure co2 through a 2000l / hour reactor
    two 1200l / hour canister filters
    Kh 130ppm
    PH 6.8
    No3 25ppm

    Weekly 50 % water changes
    add KNo3 (5g twice a day) otherwise the reading is 0 and the BGA is extreme
    add K2so4 every third day 10g
    add Mgso4 every third day 5g
    iron and trace on water change

    I am back to using tap water aged for two weeks in a plastic tank the tap water is 110 ppm Kh with a PH of 7.6

    Thanking you for any assistance
    outbackdean
     
  2. chubasco

    chubasco Guru Class Expert

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    Re: Do I strip it all down and start again

    Outbackdean,
    What is your GH? Also what critters are you keeping in the tank? Same ones
    as in the picture? And what and how much are you feeding them....Is the
    BGA in the substrate and plants both? There's something that's creating
    these anaerobic conditions which is giving you all this cyanobacteria. Sorry,
    lots of questions, one more: are you in Australia? Just a leap, with the nick
    "Outbackdean." :)

    Bill
     
  3. outbackdean

    outbackdean Junior Poster

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    Re: Do I strip it all down and start again

    Hi Bill
    Yes I am from Broken Hill as far as you can go west in NSW.
    Gh is 140ppm
    I have lost my B/nose cats and about 4 Discus That leaves four discus twenty odd cory cats
    discus are feed a beef hart mix changing with blood worms four times a day.
    BGA is mainly on the plants and the glass filter pipes etc.

    Thanking you
    outbackdean
     
  4. Tom Barr

    Tom Barr Founder
    Staff Member Administrator Social Group Admin

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    Re: Do I strip it all down and start again

    Blackout will work if you add enough NO3 thererafter.
    try this:

    Blackout the tank, cover so that nio abiment light gets in for 3 days.
    Do the 50% water change prior and after a good cleaning, fluffing of the algae off everything.

    Turn off CO2.
    Raise the spray bars from the filters up to increase flow across surface.
    Clean filters good, prune plants back, clean under driftwood/rocks etc
    Add 1 teaspoon spoon of KNO3.

    Wait 3 days

    Reconnect things, turn CO2 back on etc.

    Add:
    Traces 3x a week (15-20mls each dose)
    K2SO4: 1 teaspoon after the water change
    KNO3: 1/2 teaspoon 3x a week
    KH2PO4: 1/8+ teaspoon 3x a week(same time as KNO3)

    MgSO4, not likely you need that much, add with K2SO4 on water change day, 1/4-1/2 teaspoon.

    CO2.

    Check the CO2.
    When you started adding enough to get rid of the BBA, that increase drives the plants to go after the next nutrients on the list, NO3.

    While food has some PO4, you still need to add a lot more PO4.
    That will take care of a lot.
    So that bottomed out(NO3) and you got another species of algae.
    If yuo are having green spot algae on the glass etc, and do not have good pearling, PO4 is also a likely issue.


    Regards,
    Tom Barr
     
  5. chubasco

    chubasco Guru Class Expert

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    Re: Do I strip it all down and start again

    Also, Dean, welcome to Barrreport.com!
    The guy above, is why we are all here. Never been to Broken Hill, but could
    live and die a happy man in Cairns!

    Bill
     
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