grimlock3000
Aquarium Advice Addict
First, check all the water parameters and make sure everything is in line. Sometimes, an ammo or nitrite spike can cause fish to get weakened and then they get picked on by the other fish.
"Peaceful" fish will generally assume that attitude in a normal environment where they have a lot of room and other fish like them. Your tank is very packed, and you will be looking at well over 100 inches of fish once they grow up. Also, many of your fish like to be schools of 6 or more so they calm down and feel comfortable. You have an overcrowded tank with a rainbow of different fish that feel out of place and as a result they will behave out of character.
Like cdawson said, you are likely going to have problems until the fish population thins out, your Bettas could be just the start, and ditching the Balas and moving the Gouramis might not fix it for good.
Ok, according to their profiles every fish I have except for the Bala's are Peaceful community type fish. The Bala's come under the heading of semi-agressive (and I wouldn't have bught them if I had known). Never seen any of the beta's nip each other, yet.
"Peaceful" fish will generally assume that attitude in a normal environment where they have a lot of room and other fish like them. Your tank is very packed, and you will be looking at well over 100 inches of fish once they grow up. Also, many of your fish like to be schools of 6 or more so they calm down and feel comfortable. You have an overcrowded tank with a rainbow of different fish that feel out of place and as a result they will behave out of character.
Like cdawson said, you are likely going to have problems until the fish population thins out, your Bettas could be just the start, and ditching the Balas and moving the Gouramis might not fix it for good.