Molly Fry Dying

[maikaddy]

I have had several "litters" of guppy and molly fry. The guppies are from many different females, mollies from 2 different females. I have a separate breeding tank that I keep them in, which has been up and running for several months. I do tests to make sure water quality is appropriate in all of my tanks. My guppy babies are flourishing. Unfortunately, the molly babies keep dying. First they start to swim in a very erratic, spiral motion. Then they die. I had one survive to become almost big enough for transfer to the adult tank, but I found him dead before he quite got to that point. I have no problems with the adult mollies, just the babies. Any ideas?

 

[kewskills]

Firstly fill this out please, it will help answers

Tank size:
pH:
ammonia:
nitrite:
nitrate:
kH:
gH:
tank temp:

Fish Symptoms (include full description including lesion, color, location, fish behavior):

Volume and Frequency of water changes:

Chemical Additives or Media in your tank:

Tank inhabitants:

Recent additions to your tank (living or decoration):

Exposure to chemicals:

 

[lilfishie]

mollies do better in brackish setups, in freshwater they are prone to diseases maybe that what happened to them. did they have and spots? any flicking? how was there eating?

 

[zarebskifish]

they eat loads there all up the top of the tsank when i come in my room but they do have whitespot at the mo
but im treeting it
what if i fead them BS and blood worm?
would that make the women furtalise the eggs

 

[maikaddy]

mollies do better in brackish setups, in freshwater they are prone to diseases maybe that what happened to them. did they have and spots? any flicking? how was there eating?

They didn't have any spots or anything. It seems like they got fatter- they were black mollies and their bellies turned kind of silverish like they were bloated. So I was thinking maybe swim bladder. They swam in spirals by that point. I just don't understand why, if that were the problem, the guppies never got it. They ate just fine though. At least up until the point that they couldn't swim straight. And they didn't all get sick at once. It was one here, one there, until they were all gone. I've got one left. And now a whole new bunch that I'm afraid will suffer the same fate.

 

[maikaddy]

Firstly fill this out please, it will help answers

Tank size: 10 gallon
pH:
ammonia:
nitrite:
nitrate:
kH:
gH:
tank temp: 76-78 degrees fahrenheit

Fish Symptoms (include full description including lesion, color, location, fish behavior): They seemed to bloat a little bit and then swam in spirals. Not all sick at once. It was several months before they were all gone.

Volume and Frequency of water changes: Usually 25% changes, less frequently than the larger tanks because I wasn't sure if it would stress the babies. Maybe once a month.

Chemical Additives or Media in your tank: Aquarium salt and start right.

Tank inhabitants: Guppy and Molly fry- probably a combined amount of about 40 initially. Now down to in the twenties with just one molly fry and the rest guppies. One cory-cat, two otocinclius (?).

Recent additions to your tank (living or decoration): Most recently was a banana plant, but that was after the mollies were almost all gone. Other than that, just babies as they are born.

Exposure to chemicals: none that I know of.




I'll have to get back to you on the water tests. I'm in the process of doing a water change right now and am letting the filter run for a while. I'll check them tomorrow and write back.