My cats know the fish are a part of the family. First i was worried about drinking the water, but cats drink also outside in the river so it wont harm them.
They can also sit and look at eachother without any problems. I had to teach him.
I got a delta male and made him a high playground. As you see in 30sec how he moves in 6 minutes around laying his fins on the leafs. This is what a betta needs.
They are super fast and put on some though fights.. They new and need to establish there rang. 1 is super aggressive dont know what to do with him..
Its a 240 liter thank with full spectrum light. There are 11 Sumatraans inside and they can be wild sometimes.
Making the caves on the bottom, all with open backside so they can escape any bully if they need to.
Here is the picture of the tank after 14 months!