05-28-2011, 05:42 PM
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Originally Posted by Byron
A couple of things pop out at me here.
First on the corys; if ever I have an issue in one of my tanks related to the water or environment, it is without any question always the corys that first show signs of stress and alert me to it. And all three "dwarf" species [Corydoras pygmaeus, C. habrosus and C. hastatus] are more highly sensitive to everything. I have had on/off luck with all three over 20 years. Can you provide some more data on this tank? Water hardness and pH; nitrate level; substrate; and how long was it running before the corys were added. And which species are they?
Second issue, in my view a 10g is not sufficient space for any barb species, although cherry barb are the only ones that might manage. But they need a larger group; kept in less than 5 or 6 they frequently show aggression which is nothing more than a sign of high stress. They are only 3 in number, plus they have a "threat" in with them, which even if only now and then is going to have a significant impact on their stress level, and that weakens the immune system. The Cory problem could be linked to this issue. Fish send out chemical signals, pheromones, and other fish read them. With no escape, this can cause health issues leading to death. Not saying it is, just one possibility.
I never recommend Betta as community fish, and your situation is why. Betta on their own, or maybe with substrate fish (sometimes this works, but sometimes not). But no other mid-water fish.
Let me know the data mentioned above and I may have something to suggest.
sorry i never got an alert for this thread X( well lets see the ph is 7.4. no ammonia or nitrite. hardly any nitrate (maybe 3-5 max) um....... this tank has been runnin nicely for several years now. the two cories are running strong and contanly active and show no sign of falling. the other fish are doing excellent too. I bought a dwarf frog 2 weaks ago and shes awesome! (now a fan of frogs now). but all in all, everything is perfect sofar