Whats Happening

[privateb]

Hi Guys,
I returned home from work this afternoon to find all 6 of my neon tetras dead and the rest of the fish look as though they were struggaling for breath as they where all at the top of the tank and there gills were going 10 to the dozen.
So I have replaced all my filter mediums as i noticed the pump was not giving out very much preasure so I cleaned it all out, and now the air flow is back up to about normality.
I brought and fitted an aitstone to a pump and now have had that on for the last 2 hours.
Can you think of any thing that may be wrong
Heres the details

Tank: - Tropical, community fish 5 Black Mollies, 3 Silver Mollies, 2 Clown Loaches, 2 Small Angle fish, 2 Female Fighting fish and 3 3 spot gouramis.

Tank Temp: - 28.2 degrees

Tank PH: - 6.1

Water type: Hard

Tank clenleness 30- 40 % water change every Sunday evening, all ways replacing water with fresh start in.

The tank has been set up for 1 year now and only lost 4 fish in that time and now 6 in a day
No new fish have been added for 2 months

Hi Guys,
I returned home from work this afternoon to find all 6 of my neon tetras dead and the rest of the fish look as though they were struggaling for breath as they where all at the top of the tank and there gills were going 10 to the dozen.
So I have replaced all my filter mediums as i noticed the pump was not giving out very much preasure so I cleaned it all out, and now the air flow is back up to about normality.
I brought and fitted an aitstone to a pump and now have had that on for the last 2 hours.
Can you think of any thing that may be wrong
Heres the details

Tank: - Tropical, community fish 5 Black Mollies, 3 Silver Mollies, 2 Clown Loaches, 2 Small Angle fish, 2 Female Fighting fish and 3 3 spot gouramis.

Tank Temp: - 28.2 degrees

Tank PH: - 6.1

Water type: Hard

Tank Capacity 120 Litres

Tank clenleness 30- 40 % water change every Sunday evening, all ways replacing water with fresh start in.

The tank has been set up for 1 year now and only lost 4 fish in that time and now 6 in a day
No new fish have been added for 2 months

 

[PaulasPets]

I think a 30 - 40% waterchange is a bit much, but this is not something that could have caused your problem. If the pump was not running too good I guess that was your problem right there. This shouldn't be a problem if you have enough plants in your tank though... Did you do any water testing?

 

[Pheonix]

is you tank planted? or do you have plastic plants?

the pump will help for the mean time
be carefull now youve replaced all you filter media, it will take time for the bacteria to build up again on these!!!

try knocking you temperature down a degree or two, all those fish will be fine at that temp and slightly more oxygen will be available as oxygen decreases as temperature increases,

Andy

 

[privateb]

I have plastic plants, I will try dropping the temp down a couple, thanks Andy