Channas are very forgiving in water changes, sub tropicals are anyway, because of their ability (and need) to breath air.
I have not kept Lucius, so I can't share experience, but they're sub-trop, so the care shouldn't differ. There is a sticky in these forums about all channas, and i'm sure Lucius is one of them!
Just know that the tank you have wouldn't be able to house a Lucius, or an arowana. At best, you'll have a year (TOPS) keeping a Lucius in there, granted you get him as a juvie.
141 liters is just enough for the dwarf species, but that's about it.
I have not kept Lucius, so I can't share experience, but they're sub-trop, so the care shouldn't differ. There is a sticky in these forums about all channas, and i'm sure Lucius is one of them!
Just know that the tank you have wouldn't be able to house a Lucius, or an arowana. At best, you'll have a year (TOPS) keeping a Lucius in there, granted you get him as a juvie.
141 liters is just enough for the dwarf species, but that's about it.