Dying fishes

[joseph_zhou]

My tank condition is as follows:
NO3 - 10mg/l
NO2-N - <0.1mg/l
NO2 -<0.3mg/l
ph -~6.5
I have yet to measure the KH yet, since i have not get the indicator. Currently i have 3 SAE, around 16 swordtail and 3 gupppies. I cant find out the reasons why my fish are dying every one or 2 days.... They swim normally before they die. And my dying fish are the swordtails( even though they are the one who are expandable), but i wish to find out the cause.

[Simon]

[quote:29a8eae704="joseph_zhou"]My tank condition is as follows:
NO3 - 10mg/l
NO2-N - <0.1mg/l
NO2 -<0.3mg/l
ph -~6.5
I have yet to measure the KH yet, since i have not get the indicator. Currently i have 3 SAE, around 16 swordtail and 3 gupppies. I cant find out the reasons why my fish are dying every one or 2 days.... They swim normally before they die. And my dying fish are the swordtails( even though they are the one who are expandable), but i wish to find out the cause.[/quote:29a8eae704]

jose, are you using any anti-chlorine or medication during water change? reasons here can be rather tricky, some members experiences deaths after trying everything in the book

[joseph_zhou]

I use nutrifin anti chlorine & chloramine, during water changes. My water conditions are rather stable. I am not sure if it is due to my long photo period that stresses them.... Due to studies and work constraints, there are times that i on my lights for 14 hrs..... Hope that this is not the cause..

[Simon]

[quote:cdd037b11e="joseph_zhou"]I use nutrifin anti chlorine & chloramine, during water changes. My water conditions are rather stable. I am not sure if it is due to my long photo period that stresses them.... Due to studies and work constraints, there are times that i on my lights for 14 hrs..... Hope that this is not the cause..[/quote:cdd037b11e]

long photo period shouldn't be the cause of those dying fishes, what fishes do you have in your tank? could it be smaller fishes are prey upon by larger fishes?

[joseph_zhou]

I have 9 swordtails, 8 glowlight tetra and 2 50 cent size discus... But i think one of my tetra has white spot... dunno why kanna also

[Simon]

[quote:033015fea3="joseph_zhou"]I have 9 swordtails, 8 glowlight tetra and 2 50 cent size discus... But i think one of my tetra has white spot... dunno why kanna also[/quote:033015fea3]

should be the change of weather (inconsistent temperature) that weakens the immune system of the fishes that causing stress. You should remove the infected and treat them separately