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Thread: Oxygen too low?

  1. #11

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    0 Not allowed!
    Quote Originally Posted by talldutchie View Post
    I know those systems. Unless you make a serious error filling it (which would have all your fish gasping) it's not the issue.

    What I see in the vid... gut feeling is internal parasite of some kind.
    Well unfortunately that fish is now dead, found him at the back of the tank today. So thats 2 Pentazona's ive lost in the space of a few days, I can only see 1 of my Galaxy Rasbora, and one of my Black Phantoms is showing similar behaviour to the Pentazona.

    Should I try medication? I have some which is for parasites, I was thinking of doing my scheduled water change then dosing some?


    27 Gallon planted: Super Dragon Betta, Neon Tetras, Honey Gourami, Rummy Nose Tetra, Checker barbs, Bolivian Ram, Otocinclus, Amano shrimp, Assassin snails.

    75 Gallon Reef: Ocellaris Clownfish pair, Firefish, Royal Gramma, Bangaii Cardinal, Midas Blenny, Coral Beauty Angelfish, Cleaner Shrimp, 18+ crabs and snails

  2. #12

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    0 Not allowed!
    Quote Originally Posted by serbusfish View Post
    OK I removed the co2, now during the night o2 levels read around 5mg/l, and in the day they are around 8mg/l.
    Ok - those O2 readings are the absolute limit so you have absolutely no need for a CO2 unit in my opinion.

    Not sure what to suggest other than ensure there is proper water circulation in the tank (your video makes the water column look very still) and do daily water changes until you stop losing fish.
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  3. #13

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    0 Not allowed!
    Quote Originally Posted by serbusfish View Post
    Well unfortunately that fish is now dead, found him at the back of the tank today. So thats 2 Pentazona's ive lost in the space of a few days, I can only see 1 of my Galaxy Rasbora, and one of my Black Phantoms is showing similar behaviour to the Pentazona.

    Should I try medication? I have some which is for parasites, I was thinking of doing my scheduled water change then dosing some?
    Seems odd that you have one death happening right after the other. If low oxygen was the culprit, I'd suspect that you'd see more troubled fish at the same time, than you actually are... and if not, why would the same level of oxygen kill off a healthy fish, once another fish has already died? That's less competition for the same oxygen in the water column. I'm leaning toward a parasite of some kind. Not sure how quickly you're seeing the effects from fish to fish, but it looks like when one fish dies, the next would starts showing signs of trouble.

    Is that a correct assessment?
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  4. #14

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    0 Not allowed!
    Yes thats correct.

    In the last week or so ive lost 2 Galaxy Rasbora, 2 Pentazona Barbs, and today 1 neon tetra. The fish are showing no external signs of illness so im at a loss. Should I treat some parasite medication?


    27 Gallon planted: Super Dragon Betta, Neon Tetras, Honey Gourami, Rummy Nose Tetra, Checker barbs, Bolivian Ram, Otocinclus, Amano shrimp, Assassin snails.

    75 Gallon Reef: Ocellaris Clownfish pair, Firefish, Royal Gramma, Bangaii Cardinal, Midas Blenny, Coral Beauty Angelfish, Cleaner Shrimp, 18+ crabs and snails

  5. #15

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    0 Not allowed!
    do some 50+ % water changes and if they show no signs of improvement i would give the medication a shot
    i hear some people say, "i kept a goldfish in a bowl and it lived for a year."
    they don't know how lucky they were and all goldfish live at least 15 years in proper conditions.
    that is equal to saying my human lived in his closet for 5 years!

  6. #16

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    0 Not allowed!
    Quote Originally Posted by serbusfish View Post
    Yes thats correct.

    In the last week or so ive lost 2 Galaxy Rasbora, 2 Pentazona Barbs, and today 1 neon tetra. The fish are showing no external signs of illness so im at a loss. Should I treat some parasite medication?
    That's what I'd do.

  7. #17

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    Question


    1 Not allowed!
    I am confused relative to the possible low oxygen level - if the value your kit shows is considered low, than regardless of other issues you add an air stone - period. If ever in doubt about oxygen levels (remember, at night plants use oxygen!) always add an air stone - that is a given. Of course, kits can be in error so even if it gives an acceptable value, and you have any reason to believe low oxygen - add an extra oxygen source!

    Most med instructions often suggest adding some extra oxygen source - again, an air stone (or get a wand - whatever you like.) In general, when ever using meds it is good practice to add extra air if the tank doesn't have a clear source. The cost is very low, extremely simple and frankly, always a good idea to address issues.

    As for water changes, that should always be the first thing anyone should try when fish appear ill or stressed. By the way, your nitrates are on the possible high side (if near 20 ppm and since the color is an issue, maybe even higher.) In any case, I agree that two 50% water changes (being careful to keep pH within 0.2) should be done.

    Aside: what is the tanks and source water's pH? Also, is your water hard or soft? These are useful parameters to both know and post.

    Best of luck.
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  8. #18

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    1 Not allowed!
    I have just deleted a few posts in this thread due to them being argumentative, causing drama, and not being helpful to the OP at all

    To the members involved, you know better ! I do not need to remind you of the rules

    To the OP, my apologies for this occurrence in your thread
    If you take your time to do the research FIRST, you can successfully set-up and keep ANY type of aquarium with ease.
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