Just stumbled across this forum today as I've been having some trouble with my tank mates.

I've had an established tank for a while now - it has one Betta, Common Pleco and TWO Pink Kissing Gouramis. The Gouramis are about 7 years old now and fairly large - they've been in the same tank the whole seven years. The past week I've seen pretty constant aggression between the two.

I tried increasing planting in the tank (fake plants) heavily to see if it would help - but it doesn't seem like it has. They don't fight each other with the lip grasping - mostly just pecking and chasing.

Is my only solution to separate them? If so - are these fish okay to live alone? I would probably pull the Betta with it and have two tanks with the two fish.

Thanks for any help