Originally Posted by callistra
Well.. since you haven't gotten any response I will tell you what I know..
Why are you taking him back? They won't treat him.. they probably won't take a sick fish back after so long either.
Can the heater warm higher? 75 is chilly. Raise to 78 slowly.
I would also say just make sure you're using the correct amount of dechlorinator.. .5-1ml per gallon of stress coat. Prime works in drops but stress coat requires more.
You might actually try some epsoms instead of the nacl.. help with leaching out any toxins or fluid build up that might be attributing to his heavy breathing. Otherwise I don't know.. your ph doesn't swing or anything does it? I know mine is a constant battle because it is not the same from the tap as if its left to sit and I've made the mistake of shocking my fish pretty bad before I figured it out. (pet store is very mistaken about their RO water being stable)
Well I woke up this morning to find Romeo in his cup...alert, swimming around and breathing much better!
I was taking him back to petco because he's been doing this for almost the whole 12 days I've had him...they said I have 15 days to return him for another one but like I said I really don't want to because I like him. The temp is between 75-77.
So I've come to the possible conclusion something in his tank is poisoning him which is why I quarantined him to his cup
His original tank consisted of gravel, a bamboo plant and 3 betta bulbs...he started breathing heavy the next day I treated him with a couple 50% water changes and kosher salt and he got better I then got a bigger tank and some more plants I got from petco that were in the same tank as the bamboo plant he was fine... a day later I changed the gravel out(rinsed of course) with a 25% water change and that's when he became worse then ever so I just don't know what it could be.