Originally Posted by fishlover91
My lfs is useless all of the fish I have had from there have had white spot so I would not trusr giving him my fishes, what do you think the chances of survival are keeping them this way?
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Byron will be the best to give the details on what can and will probably happen to them if kept in that size tank with that many of them.
Overcrowding and uncompatable fish (not only by behavior but by water parameters as well) will stress the fish, weaken their immune system, make them vulnerable to illness and disease, and eventually death...in a nutshell.
With that many fish in that size tank, you also will find that some of the fish that wouldnt normally be very aggressive may become overly aggressive as they dont have their required space.
You will have a very difficult time also on keeping your water parameters in check. As your posted test results show, you have ammonia present. And I doubt there is enough surface area in a 25 gallon tank for the appropriate amount of beneficial bacteria to grow to be able to maintain that amount of fish.
You should try giving away some of the larger species and the ones that have the most out of sync compatability wise (like the minnows) to lighten the load not only for the sake of their survival, but for the quality of life of the fish.
I cant say an expected amount of time or even a precentage of survival. But I can say the side effects of a severely overcrowded tank will eventually catch up to the fish, and I can promise they wont get to their even close to their average lifespan. Eventually some of the fish will start to die off and then you will get down to a correct number of fish, and the ones that were further out of their comfort zone by water parameters, temp, and tank size will probably be the first to go, thus leaving you with a more appropriately stocked tank...however, I doubt that is how you want to get to that stocking.
You can also try re-homeing some of them by posting on TFK or craigslist, if you choose to go that route.