suffocating fishes?

C

ckck92

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Jun 6, 2007
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all my danios are only swimming at the top part of the tank, top as in where their fins cud touch the air... this has been happening ever since i got an otto, and EVER SINCE i STOP taking out my diy co2 airstone from the tank everynight.. the otto isnt doing so good either.. i have just taken out the airstone co2 from the tank and did a water change..

is this the sign of suffocation? what should i do? its been like this for 2days..
 
This has been happening for 2 days? When did you add the Oto? How is the Otos behaving and are they all eatting properly? Water readings?
 
hey.. otto seems much better now.. i really tihnk its the co2.. i even spotted the danio swimming lower =) ill just keep the co2 out of the tank till tmr and see what happens.. =)

im sorry ive got no water readings... all i can say is the tank is heavily heavily planted.. i got the otto two days ago.. when i got the otto, the problem started.. everyone is eating fine.. the danios as usual are super active eaters.. are they scared of the otto??? owh ive even spotted snails and baby fry in my tank... the fry seems to suck on glass or leaves like an otto.. cud it be otto fries? lol just wnodering... also i spotted the fry after i got the otto..

thanks all for the replies!
 
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Is this tank even cycled yet? That's probably why the fish looked like they are suffocating. I remember that you bought the danios to cycle it rather than do a fishless cycle. That left the tank pretty overstocked, but the addition of the oto makes the situation even worse. The oto will likely starve to death in such a small tank, unless there is a ton of algae for it to eat.
 
I think we need more information.

how large is the tank?
how 'heavily planted' is heavily planted? are you adding ferts?
we do need tank readings too.

it's odd in a heavily planted tank to have fish suffocating(possible problems at night but usually only when running co2)

if the tank is indeed heavily planted..the cycle as we know it goes out the window. plants will utilize ammonia as a food source..in a heavily planted(established) tank you may never see ammonia.

I also find it hard to believe that adding an oto would cause a large problem..unless the stocking is already high. or the oto introduced a pathogen of some sort.
was the oto qt for any time? or added directly to the tank?
 
heavily heavily planted as in 70% of the tank is plants.. heres a picture.. http://img292.imageshack.us/my.php?image=cimg2249ro4.jpg *no danios in the tank? 'wrong'.. all are on top*

its a 5.5g tank, a cube. note that a few weeks before this, the danios were diong fine.. after adding the otto the problem occured.. about plants using ammonia for nutrients is that true? if so, i dont have to cycle my tank? the otto wasnt quarantined.. cud this be the problem? the otto just died. :wall: i thought that otto do not produce much waste? or do they?
 
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