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Thread algae and ferts

Discussion in 'Algae Control' started by jakla, May 20, 2005.

  1. jakla

    jakla Junior Poster

    Feb 18, 2005
    Likes Received:
    Tank: 65 gallons
    4x30 w
    NO3: 25 ppm
    PO4: 5 ppm
    Co2: 38 ppm
    Kh: 16
    pH: 7.1

    I change app. 15 gallons each week.
    • Limnophila Sessiflora
    • Cryptocoryne Willisii
    • Anubias Barteri var. Angustifolia
    • Hydrocotyle Leucocephala
    • Echinodorus palaefolius var. latifolius
    • Vallisneria americana (natans)
    • Lilaeopsis Brasiliensis
    • Echinodorus Bleheri
    • Vesiculara Dubyana
    • Anubias Nana
    • Echinodorus Uruguayensis
    • Microsorium pteropus
    • Hygrophila Siamensis
    I have quite a lot of thread algae and beard algae. Since I started increasing the CO2 from 10 ppm it has helped, but it needs a thorough trimming once a week.
    I have even seen traces of BGA, which I find difficult to believe, given the NO3, but it's there...

    Any ideas?
  2. Simpte

    Simpte Prolific Poster

    Feb 17, 2005
    Likes Received:
    Re: Thread algae and ferts

    When you find out let me know. I have the same problem, though I believe mine is Co2 related.
  3. fishface

    fishface Guest

    Re: Thread algae and ferts

    i've run my co2 anywhere from 30ppm all the way up to over 100ppm and have had thread algae issues for over a year. nothing i do to change things has made a alas, i just live with it and pull as much out as i can everyday. it's not a terrible amount...just enough to p!ss me off! :mad: i wish i knew the answer. :confused:
  4. awrieger

    awrieger Junior Poster

    May 22, 2005
    Likes Received:
    Re: Thread algae and ferts

    I found an interesting thing happened last week.

    I was about to set up a new tank and tear down the old one, so I stopped bothering dosing ferts for the last week or two while I was preparing the new tank etc - and the thread algae started dying back. Not completely as there were still small patches of it in my Moss and Hairgrass. But quite the opposite to the rampant growth I was experiencing with full ferts and CO2 (30+ppm).

    My amateur conclusion is that there is an element in the ferts it needs to thrive. Iron? Magnesium? Boron? Something in full supply while I was dosing, but became depleted when I stopped dosing, so it couldn't be NO3 or PO4 (still coming from the fish). And neither did it have anything to do with the NO3:pO4 ratio as I had it set pretty much perfect so no other algae grew at all, yet this stuff was still growing rampant.

    I was also dosing Excel daily. Are all of you using Excel, or not? If not, that discounts organic carbon as a possible cause too.

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