I kept it from 6" t0 12" before I sold mine.
well vertical is norm stress. esp in bare tank.
put some drift wood big ones where it can sit below it . so call sheltered.
it will be more calm.
tig dun really like to swim. only when dim lights or off lights, it will start hunting
If u really like always swim ard kind.
will be lince or vulture cat sort of. those love to comb tank for food.
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