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Thread: Green algae with bubbles

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    Question Green algae with bubbles

    Hi to everyone.

    I have a 10 gal. shrimp tank that has been running for 3 months.

    My tank parameters are A:0 Nitrites:0 Nitrates:<5 Ph: 6.8 Temp: 25C.

    I have a Fluval substratum, an air driven sponge filter (air pump running all day long) and a DIY led lamp (with a photo-period of 12 hours).

    Recently my tank grew a green carpet that covers almost all the floor and parts of the walls. Im not concerned about the algae itself, because it could turn up to be a food source for my shrimp (CRS). What frightens me is that the carpet seems to be producing some kind of gas that gets trapped by the carpet itself and it eventually escapes to the surface.

    My question is simple... is this gas shrimp safe?

    Sorry I cant provide a picture right now, I'll try to upload one soon.

    Any reply would be very appreciated.

    Thanks in advance.

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    probably you suffer from cyanobacteria.
    Smell the algae?

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    You might actually discovered my problem, I had this silly tought that cyanobacteria affected only salt water systems. Does anyone has any input on how dangerous is this cyanobacteria to shrimp in general... I read that it could release toxins into the water column.

    Any tips on how to remove it without harming plants and inverts?

    Thanks

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    There are two prevailing theories about what causes the blue-green algae to grow -- low/no circulation and not enough nitrates. I think it may be a combination of both these factors. Try increasing water flow with a small powerhead pointed at the BGA or dose some nitrates (KNO3) to see if that helps. An extra does of nitrates may also help the plants.

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    Oh, almost forgot, you can use a turkey baster or pipette to remove as much of it mechanically as you can/want... then you can implement the suggestions above as prevention measures. As far as your critters eating the BGA, don't count on it. It is one of those things that nothing wants to touch.

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    Thanks a lot for your quick response.

    I removed it using a small fish net and moving it vigorously (doing circles) inside the tank to create some current and when de cyanobacteria deattached itself from de substrate/walls then I netted it. I also did a 25% water change. Additionally the tank wont have any illumination for 3 days and I wont feed my shrimp for two days (I read that cyanobacteria blooms have something to do with 3 key factors: 1. Nutrient excess, 2. Low wave illumination and 3. poor water circulation).

    I still have to improve water circulation, but I dont want to stress my shrimp with a a strong current, and if I use a power head I will need to make sure the intake is shrimp safe.

    I'll keep you informed. I hope this is enough to get rid of cyanobacteria.

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    Well, it seems that cyanobacteria is a die hard bacteria. It just keeps coming back from the grave.

    I keep removing it from the glass walls and from my substrate but it keeps growing out of nowhere.

    Any tips? Has anyone here erradicated it successfully from his/her tank?

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    Treat your tank with erythromycin. It should get rid of the cyanobacteria, but it may also compromise your cycled filtration media. I would try the natural remedies I suggested above before going this route though. Good luck.

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    I had problems with cyanobacteria for a while in my 10g. I was happy thinking my java moss was pearling but really it was the cyano

    What I did was add some anacharis plants which made the cyano shrivel up within a week. Apparently the anacharis (or any elodea) releases some sort of antibiotic that chokes the cyano.

    Worked for me. Give it a try!

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    You could use hydrogen peroxide 3% solution and squirt that directly onto the bacteria, but make sure all flow is off for 20 mins. This worked for me

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