Green algae problems

Discussion in 'Nano Tank advice' started by Kevin, 18 May 2009.

  1. Kevin

    Kevin

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    Howzit guys,

    My Nano has been running now for about five months (Boyu TL550). I have had very good water parameters from the beginning.

    Tank inmates:

    2 small clown fish,
    2 Cardinal
    1 lemonpeel angel
    1 turbo snail
    2 hermit crabs
    1 cleaner shrimp

    Currently the parameters are as follows:

    PH 8.2
    Alkalinity 6 (this has dropped from 10, a major water change will rectify)
    Ammonia 0
    Nitrite 0
    Nitrate 10 (fluctuates between 5 and 10)
    Phosphate 0 (Elos)
    Calcium 400

    The tank has been through cyano outbreaks (salt change fixed this), brown algae outbreaks and now a green algae is forming on the glass.

    This green algae is almost impossible to get off. It grows in tiny spot like colonies which need considerable force to be removed. Problem is that in the effort to get them off, I scratch the acrylic.

    Any ideas?
     
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  3. ADVdiver

    ADVdiver

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    Use an old credit card to scrape off the algae. If you maintain a high KH you will prevent the cyano from returning. Do you run carbon or Phosphate remover. Some pics please if you can.
     
  4. Kevin

    Kevin Thread Starter

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    I just run carbon in the back of the nano, in the second compartment.

    First compartment is the skimmer and filter floss.
     
  5. ADVdiver

    ADVdiver

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    when last did you replace the carbon.
     
  6. ADVdiver

    ADVdiver

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    IMO I would only use carbon for three days in a 30 day cycle. It is a chemical filter and does not distinguish between good and bad. It can also only remove so much and once it is full it releases everything back into your water. This is also why your KH is dropping.
     
  7. Kevin

    Kevin Thread Starter

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    I replace the carbon every two weeks.

    About 60g in a filter bag
     
  8. ADVdiver

    ADVdiver

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    what purpose are you using the carbon for and what brand of carbon is it.
     
  9. Kevin

    Kevin Thread Starter

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    I cant remember the name of the carbon, but it is a good quality one.

    All the stuff I found on carbon says that it 'polishes' the water and removes toxins.

    Will carbon create a green algae problem?
     
  10. brettb2020

    brettb2020

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    hey guys! i got the same problem in my nano. its not bad on the glass but on my bio rock its bad!

    i have biorock and live rock but the algae is only growing on the biorock. is the biorock maybe releasing something making algae grow?

    kevin hope you dont mind me joining :) was just about to start the same thread lol.
     
  11. Kevin

    Kevin Thread Starter

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    No prob :thumbup:
     
  12. ADVdiver

    ADVdiver

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    Carbon may create the problem if it has released the toxins back into the water.
    Your carbon is pulling out all trace elements in your water as well.
    My recommendation is only to put the carbon in if your water clarity is not that great and only do this for three days.
    Use something like phosban or rowa phos or elimi phos to remove phosphates instead of the carbon you will also find your KH will stabilize and will be easier to adjust.
    Do you dose kalkwasser.
     
  13. Kevin

    Kevin Thread Starter

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    Hey Brett,

    I see you have an algae scrubber running. Isnt that supposed to get rid of algae in the display tank?

    I have thought about installing one, but I need to drill two holes into the Nano. I am still weighing up the pro's and cons.
     
  14. ADVdiver

    ADVdiver

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    Also check your phosphate with another test kit (brand)
    Or even have it checked at your LFS
     
  15. Kevin

    Kevin Thread Starter

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    I add concentrated calcium hydroxide solution every second time I top up the tank. Any more than this and the PH goes up.

    I keep the calcium levels above 400. The coraline is going mad at the moment and is chowing calcium.

    I also dose with sodium bicarb when the Alkalinity goes down below 6, but only as a temporary measure. I usually do a 16% water change every two weeks which seems to buffer the alkalinity correctly.
     
  16. ADVdiver

    ADVdiver

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    Sounds good.
    I would discontinue the carbon and run a phosphate remover. and check the PO4 level with another brand.
     
  17. Kevin

    Kevin Thread Starter

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    What phosphate remover is good to use. Do I use it the same as the carbon?

    My test kit is Elos, which I have heard is pretty good, but I will get some water tested at the pet store this weekend.
     
  18. ADVdiver

    ADVdiver

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    Rowa phos, Elimi phos or phosban. Rowa is the best. You can use it as you do the carbon and the beauty of it is that it does not release the phosphate back into the water.
     
  19. brettb2020

    brettb2020

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    ya i do have an ats. working well. my nitrates and phosphates are zero and i dont get any algae in my DT except on my bio rock. thats why i think its releasing phosphates or something. have heard of it before.
     
  20. ADVdiver

    ADVdiver

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    Post pic please. I have a possible answer but need to see it first
     
  21. brettb2020

    brettb2020

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    [​IMG]

    [​IMG]
     
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