JGixxer Posted January 21, 2008 Report Share Posted January 21, 2008 (edited) So I have a 90 GALLON comunity tank w\3 iridecent sharks, 20 or so rasboras, and 10 tetras. yesterday I did a 60% waterchange, removed the old rocks and sand, and scrubed the algae off the tank (no chemicals used) filled the tank back up(used conditioner)added a new large Bala and two small plecos. This evening I notice that all the fish are at the top gulping air, the water is really cloudy and my filter stopped(I have a large cannister filter) So I change the filter and go out for dinner. When I came back all 9 Balas were dead.... what the hell happened??? Edited January 21, 2008 by JGixxer Quote Link to comment Share on other sites More sharing options...
Parachromis1 Posted January 21, 2008 Report Share Posted January 21, 2008 filter stops= bad water. a 90 liter tank IS too small for that much of a bioload. plus if you switch out the filter you lose all your beneficial bacteria. so there is your answer. Quinn Quote Link to comment Share on other sites More sharing options...
JGixxer Posted January 21, 2008 Author Report Share Posted January 21, 2008 (edited) filter stops= bad water.a 90 liter tank IS too small for that much of a bioload. plus if you switch out the filter you lose all your beneficial bacteria. so there is your answer. Quinn ok, but would it happen that fast. I havent ever had any problems with this tank, with these fish, and would adding three more fish and changing the filter cause only the Balas to die in a 24 hour period? Could it be a Bala specific diesease that the new one brought into the tank? and that is 90 gallons, not liters...oops Edited January 21, 2008 by JGixxer Quote Link to comment Share on other sites More sharing options...
Parachromis1 Posted January 21, 2008 Report Share Posted January 21, 2008 disease doesnt kill that quick. i would guess its human error. Quinn Quote Link to comment Share on other sites More sharing options...
JGixxer Posted January 21, 2008 Author Report Share Posted January 21, 2008 disease doesnt kill that quick.i would guess its human error. Quinn well I'm gona get the water tested tommorrow, mabey that will tell me somting. Thanx for the input Quote Link to comment Share on other sites More sharing options...
Parachromis1 Posted January 21, 2008 Report Share Posted January 21, 2008 IMO i'd just move the fish to another tank if you have one and start this tank over like its new. sounds like you have some nasty bacteria with the balas dying and the white cloudy water. Quinn Quote Link to comment Share on other sites More sharing options...
JGixxer Posted January 21, 2008 Author Report Share Posted January 21, 2008 IMO i'd just move the fish to another tank if you have one and start this tank over like its new.sounds like you have some nasty bacteria with the balas dying and the white cloudy water. Quinn well I already just changed out 90% of the water again, so it is prettymuch a new tank. Cloudyness is almost gone, and remaining fish seem happy again. Quote Link to comment Share on other sites More sharing options...
Parachromis1 Posted January 21, 2008 Report Share Posted January 21, 2008 just keep an eye on it since it can still crash. Quote Link to comment Share on other sites More sharing options...
Qattarra Posted January 21, 2008 Report Share Posted January 21, 2008 It does sound like you had an oxygen deficiency. On top of that you likely had a nitrite spike. This spike does happen quickly and the balas might just have been stressed with the move and just couldn't handle it. Sorry about your loss. Quote Link to comment Share on other sites More sharing options...
Toirtis Posted January 21, 2008 Report Share Posted January 21, 2008 1. The tank was overloaded to begin with. 2. The massive water change likely caused at least some sudden change in water parameters. 3. Removing all the substrate disrupted the biological bed and likely released a fair amount of organic material into the water column. 4. You added more fish, adding to the already huge bioload....and the bala sharks are typically difficult to acclimate at best. 5. I have no idea why the filter stopped, but the lack of filtration, combined with a lack of oxygenation was a major factor. Quote Link to comment Share on other sites More sharing options...
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