[Cichlid Man]

Whats the size of his tank? Who are his tank mates? What's the temperature? And most importantly what is the water chemistry like?
All of these factors will add up in the end and hopefully there will be a solution.

 

[Cichlid Man]

I'm not a betta expert but what will adding mature rock and brick do?

 

[Cichlid Man]

Wow, you must of paid a lot for your betta if it's a Pi then.