Looks bigger than a 10G...
Get more plants to break up the line of sight. He's being territorial sounds like. With more plants it gives the others places to retreat and hide.
BTW, lovely looking betta.
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46G Bowfront-
1 Dwarf Gourami
1 Golden German Blue Ram
1 Bolivian Ram
2 neon tetra
3 White Skirt Tetra
1 Cherry barb
2 Pepper cories
5 otos
10G- Hospital/Quarintine tank
2 neon tetra |