Been seeing something strange today ...
After a partial WC yesterday (about 25%), one of the corys started gulping a lot more air than usual. It swims up to the surface, but instead of one gulp, it takes about 3 of them (bobbing up and down by the surface) and then shoots back down to the gravel. Been doing this regularly since the WC. Also seems quite lethargic and doesn't move much along the gravel. Finally, when I try to take a close look when it's resting, it seems to be breathing pretty hard.
Should be plenty of aeration due to airstone and HOB filter.
Relatedly, I found a dead rainbowfish this morning ... not sure if the two are connected.
Is it possible that the WC induced some sort of pH shock? Last I checked, the tank is around 7-7.2, whereas the water out of the tap is higher (7.6-7.8), possibly because of the small driftwood in the tank or general degradation of pH over time?
Other than monitoring, anything I can do for the cory that seems to be in some distress?
Thanks as usual, and best wishes to all on this holiday season!
After a partial WC yesterday (about 25%), one of the corys started gulping a lot more air than usual. It swims up to the surface, but instead of one gulp, it takes about 3 of them (bobbing up and down by the surface) and then shoots back down to the gravel. Been doing this regularly since the WC. Also seems quite lethargic and doesn't move much along the gravel. Finally, when I try to take a close look when it's resting, it seems to be breathing pretty hard.
Should be plenty of aeration due to airstone and HOB filter.
Relatedly, I found a dead rainbowfish this morning ... not sure if the two are connected.
Is it possible that the WC induced some sort of pH shock? Last I checked, the tank is around 7-7.2, whereas the water out of the tap is higher (7.6-7.8), possibly because of the small driftwood in the tank or general degradation of pH over time?
Other than monitoring, anything I can do for the cory that seems to be in some distress?
Thanks as usual, and best wishes to all on this holiday season!