Last year I bought a 2.5 gallon tank and a betta to live in it. He lasted a few months and then died mysteriously with no signs of fungal/bacterial issues and water parameters were ok using the master test kit (strips, not the drop test). I would like to try again. His tank will have a heater and a filter. I was wondering if a live plant would be feasible or even a good idea for a betta. TIA!