Lost 4 Fish In The Past 2 Weeks

[augustaranger]

Lost 2 guppies and 2 danios all of a sudden in the past couple of weeks. The tank is 4 months old and always has great water stats. Currently it is not heated, but stays in the low 70's. The guppies became sort of lethargic, and before thay died, were staying near the surface at a 45 degree angle. The danios died suddenly. What should I look for? Maybe just bad luck? I want to add 4 cories very soon, but should I wait?

 

[Hero]

Gonna need tank size, water stats and all tank mates for someone to help.

 

[augustaranger]

Please see my signature. Zero ammonia, PH is 7.

 

[Hero]

Please see my signature. Zero ammonia, PH is 7.

What are the nitrite and nitrate levels?

 

[augustaranger]

Nitrate 0. Don't have a test for nitrites. 25-30% water change weekly.

 

[SJ2K]

You'll want to get yourself a test for nitrite, as unlikely as it is if your nitrate is still 0 then all nitrite may not be getting processed atm. Only takes 1 nitrite spike to kill certain fish.

 

[augustaranger]

Lost another danio today. I had noticed he wasn't very active and seemed to have slight arch in his back as did another that died. The rasboras and neons seem to be doing great. Any ideas?

 

[robbo87]

maybe edge the temperature up a little seems quite cold to me an shouldnt hurt your others to give it a try will prob make them more active too!