Ok, my mature tank has been fine, except hubby doing a filter change last night (rinsing the media and sponges in tank water), and all was well. I did a 30% weekly water change today, and now my fish are gasping!!! Just checked peramaters, and they are as follows:
Ph 7.0
Ammonia 0 ppm
Nitrites 0.5 ppm
Nitrates 20 ppm
I know this is bad, but can I do another water change to soon. I have new stock and nont want to lose any of them!
Are these levels high enough to kill my fish??
Julia
Ph 7.0
Ammonia 0 ppm
Nitrites 0.5 ppm
Nitrates 20 ppm
I know this is bad, but can I do another water change to soon. I have new stock and nont want to lose any of them!


Are these levels high enough to kill my fish??
Julia