why gourami chasing this new fish

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Once a fish is able to understand that Gouramis don't cause much damage (because of their small mouths), they will be able to not be stressed out by the gourami. For example, my Jewel cichlid realized that "hey that gourami is chasing me around, but hold up he's just bluffing," so my jewel cichlid just turned around and fought a real fight with my gourami and won. On the other hand, my keyhole just doesn't understand that concept and gets chased around a lot.
 
Once a fish is able to understand that Gouramis don't cause much damage (because of their small mouths), they will be able to not be stressed out by the gourami. For example, my Jewel cichlid realized that "hey that gourami is chasing me around, but hold up he's just bluffing," so my jewel cichlid just turned around and fought a real fight with my gourami and won. On the other hand, my keyhole just doesn't understand that concept and gets chased around a lot.
Thank you. I will then just leave them for couple of days and just to see if Ram would be able to call gourami's bluff.
 
Even though Gouramis have small mouths, they can do a lot of damage.
It is possible that if the Ram accepts a submissive status it could work out, or...
It may just be killed (and often a submissive fish is not killed outright, but driven to disease or death by stress).
As Deadeye observed that tank is too small for more than one territorial species.
Nonterritorial dither type fish such as barbs that inhabit the same geographic area would be better choices.
There are reasons proper biotopes are often more successful, and why non-geographically correct hodgepodge tanks often have problems.
 
The proper tank for a Ram (that size tank would work). would be a South American biotope, with Rams as the main cichlid(s) (although another pair of Apistos could work) and smallish, non-nippy tetras, or pencil fish or other geographically small shoalers.
Leaf litter is part of their natural biotope, and beyond the cover leaf litter provides, would add tannins that are a healthy addition those species tanks.
The tannins add an anti pathogenic bacterial component.
 
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