without causing an ammonia spike? I'm so confused. The tank has been cycled for 7 weeks. 7 straight weeks of 0 ammo 0 nitrite 20< nitrates.
On Sunday I did a 20% WC and about 5 minutes after getting everything put away one of my danios absolutely freaked out. Rocketed straight to the surface, gasping for air and dropped dead in just a minute or two. I tested the water and it was 0 ammo 10 nitrite(!) and 10< nitrates. I did have to use a strip test kit for the nitrites and nitrates so I'm not sure how accurate they were. But it was definitely VERY high...as high or higher than the test could read.
I immediately did a 70% water change and treated with salt (all natural kosher, not table...just to be clear.) Everyone else seems to be OK. The nitrites are still elevated and I'll be doing another WC in a few. Can a tank partially re-cycle? Is there something else here I need to be thinking about?
The danio I lost was my favorite little punk too.
On Sunday I did a 20% WC and about 5 minutes after getting everything put away one of my danios absolutely freaked out. Rocketed straight to the surface, gasping for air and dropped dead in just a minute or two. I tested the water and it was 0 ammo 10 nitrite(!) and 10< nitrates. I did have to use a strip test kit for the nitrites and nitrates so I'm not sure how accurate they were. But it was definitely VERY high...as high or higher than the test could read.
I immediately did a 70% water change and treated with salt (all natural kosher, not table...just to be clear.) Everyone else seems to be OK. The nitrites are still elevated and I'll be doing another WC in a few. Can a tank partially re-cycle? Is there something else here I need to be thinking about?
The danio I lost was my favorite little punk too.
