My Mollies Keep Dying... Please Help :/
Posted 12 August 2008 - 06:44 PM
I have a powerfilter rated for a 75 gallon tank and a heater that keeps the tank at 76 degrees (Fahrenheit)
They showed no signs of disease, and most of them were active and vibrant right until they died. I have been feeding them tropical flakes and sinking bottomfeeder wafers for the catfish. The mollies have not been overeating before they died (most of them didnt eat the first day anyway, before they died).
Please give me any solutions you can think of for keeping my mollies alive. The label at petsmart says they are supposed to be easy to take care of, although my brother has told me not to get them because they die, i really like the way they look and want to be able to keep them. Any advice would help, including "go somewhere else for mollies."
I have a freshwater test kit and will be testing my water later today
thanks for your help :P
Posted 12 August 2008 - 07:02 PM
well firstly i must say that there is actually little bacteria in the gravel, it would have been much better to have added some mature media from your brothers filter,
with just this small amount of bacteria going into the tank i'd say that the tank couldn't have become fully cycled.
did you test the water before adding the fish? It may have been simply due to very different water parameters,
Is it just the mollies that are dying?
Do you know if your LFS puts salt in with their mollies?, if they do then this could be another explanation
Lastly what size tank do you have?
Posted 12 August 2008 - 07:16 PM
i have had 7 mollies die, and only one platy
i do not know if they use aquarium salt in the molly tanks at petsmart ill check that
my tank is 55 gallons, so thats about 210 liters (a little less)
Posted 12 August 2008 - 07:31 PM
Once water tests are done we will have a better idea
Posted 12 August 2008 - 07:45 PM
If I do add salt will that be a problem for any of my other fish?
Posted 12 August 2008 - 09:58 PM
I have some small plants in the tank, that shouldn't be a problem though.
Posted 12 August 2008 - 10:05 PM
Posted 13 August 2008 - 06:22 AM
Posted 13 August 2008 - 06:59 AM
ive been reading through the forums, and it sounds like mollies really do significantly better with aquarium salt, and since they keep them with some salt at my LFS, is it possible that this could be why they are dying? Now, i keep fish other than mollies in my tank, so i was wondering if it would be a good or bad idea to add salt, or if there were some kind of happy medium i could find to, say, only make the water a bit more salty. Or if maybe i should jsut forget about keeping mollies with my other fish.
They do better with marine salt (different than aquarium salt, which won't serve long term for the same purpose), shock could be doing it, but the ammonia levels you mentioned are toxic to just about any fish, and shock from salinity changes should be killing faster than a day or two. Mollies are very adaptable to salinities. As for the pH - they like it high, and brackish water tends to have a very high pH anyway.
I've heard a good few people have their first fish last for weeks with high ammonia, but new fish croak within hours from the sudden exposure to ammonia - if the levels aren't fixed, the first fish will usually die as well.
Fresh water fish vary a lot in how they handle salt, but in general, if they don't need it, don't use it. The happy medium would probably be hard alkaline water, not an extra light brackish.
For immediate terms, address ammonia and (eventually) nitrite levels - neither should be allowed over .25 at any time. If you try to raise the salinity now, you'd just go broke adding it with all the water changes while ammonia and nitrite are still present.
Edited by Corleone, 13 August 2008 - 07:06 AM.
Posted 13 August 2008 - 07:00 AM
Posted 13 August 2008 - 10:53 AM
is adding salt going to hurt my pleco or cory catfish?
and should i add the amount the salt container says? or more? or less?
sorry for all the questions but my brother insists that aquarium salt would be extremely bad for my catfish, and also reminds me all the time that he had mollies using my water and htey lived for a long time and had lots of babies, and then here on the forums i have people telling me to add aquarium salt and people telling me not to, and its really jsut confusing me
Posted 13 August 2008 - 11:22 AM
I would do a 30% water change today and then test the water again, you will need to do this daily until the nitrite and ammonia have both settled at 0
Once the parameters have been stable for a few days you will be able to see how the fish are behaving in the ideal conditions meant for them
IMO if they are doing fine in your brothers tank then hopefully they will be fine in yours
To clarify i will say that in most cases mollies do prefer a little salt, however as your brothers stated any South American Catfish will not handle salt well/
Posted 13 August 2008 - 04:39 PM
Posted 14 August 2008 - 03:53 PM
Best bet is to take all the fish back and complete a fishless cycle.
Within that time study fish which are compatible with each other.
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