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Annoying BGA!

Discussion in 'Algae Control' started by Matty, Oct 8, 2011.

  1. Matty

    Matty Junior Poster

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    Hi everyone!
    I have been having problems with BGA for some time now in my 125l aquarium. I have approx 2wpg of light on for 8 hours a day, a 100lph internal filter and a Tetratec EX700 external filter as well as a hydor koralia circulation pump. I am using pressurized co2 and dosing using EI. I am adding aprroximately 30-40ppm of nitrate per week and 6ppm of phosphate. Firstly, I tried upping my fertiliser dosage and adding more nitrate. The BGA improved slightly but was still there. I ended up after a few weeks of battling the BGA doing a 3 day blackout. This got rid of virtually all of the algae so i did a thorough clean of filters and a large 50-60% water change. All was well for a few weeks until I went away for 4 days and the algae had returned when I got back. I got someone to add the ferts while I was away. I also have the blinds shut in the room most of the day to stop sunlight hitting the tank.
    The plants had got very overgrown while I was away so I have given them a good pruning, as the flow in the tank was being restricted by the plant mass. Would this cause the BGA to return? Is there anything I could be doing wrong?
    Any suggestions would be greatly appreciated
    Thanks
     
  2. Matsyendra

    Matsyendra Junior Poster

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    I know flow is important and perhaps it is contributing to your issue. I know in my tank I had 5 ppm of NO3 on one side of tank and 25-30 on the other side in the space of about 18 inches... that was with 7x tank turnover... i upped it to slightly above 11x and it balanced out.

    If you are dosing following EI then it wouldn't seem that lack of nitrate is the issue, but quite possibly inadequate flow.
     
  3. Tom Barr

    Tom Barr Founder
    Staff Member Administrator

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    Yes, give the tank a good trim too and then you might need to redo the blackout.

    Make sure to dose well after..........or the BGA will keep coming back after a week or so.
     
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