Goldfish dying?

Question

I have a 20-gallon, mature, well-cycled tank. I bought two very small fantail goldfish to start, but one died after a month. Before he died he looked like he had swim bladder infection--was swimming sideways/upside down, hiding under rocks and in plants. I took him out and put him in a separate hospital tank, but he died anyway. The other one was/is fine, as was the water, which I keep meticulously clean (weekly 30% water changes).

I bought a new fantail 10 days ago, and he died the same way. My other original fish is happy and healthy after two months with us; water quality is good. I don't want to leave that one in there alone but am nervous about putting a new one in there. I don't want anymore of them to die so unnecessarily. Any ideas on what is going wrong?

Answer 1

first newly bought fish should be quarantined even from a reputable fish store.  Luckily swimbladder is not contagious.  you can buy a new one then quarantine for weeks then add in your main tank.

Answer 2

stick a potatoe in the tank and see if they live?? =]

Answer 3

FLUSH IT HURRY BEFORE IT BECOMES A ZOMBIE AND EATS U!!!

Answer 4

wow you are way to interested in fish

they're tiny little things; they die like insects. dont think so much

Answer 5

It's SBS (swim bladder syndrome), it's caused by overfeeding. Goldfish are opportunist eaters and will continue to eat even when full. Just reduce the feedings and you should be fine.

Answer 6

first off if you do get another fish i would buy it from a different petstore it sounds like the ones you are getting are not very good quality. try getting a fish thats a little more mature maybe? it won't be as sensetive. i have 2 fish in my 25 gallon tank that i just got and they are both doing fine  http://www.youtube.com/watch?v=uRttn0ECP... just make sure you look very closely at the fish in the store and pick out the one that is energetic and happy looking also don't get a fish from a tank that has fish in it that have swim bladder sickness because it could have gotten the other fish sick. hope this helps

Answer 7

i think your just unlucky i had a bunch of gold fish die they just have a short life span. I have one right now and i put a plant in the tank and he seems to like the plant (it's a real plant) try that maybe